diff --git a/dlls/ntdll/directory.c b/dlls/ntdll/directory.c
index 74699490193..baff45aa906 100644
--- a/dlls/ntdll/directory.c
+++ b/dlls/ntdll/directory.c
@@ -2302,7 +2302,7 @@ static void WINAPI read_changes_user_apc( void *arg, IO_STATUS_BLOCK *io, ULONG
     RtlFreeHeap( GetProcessHeap(), 0, info );
 }
 
-static NTSTATUS read_changes_apc( void *user, PIO_STATUS_BLOCK iosb, NTSTATUS status, ULONG_PTR *total )
+static NTSTATUS read_changes_apc( void *user, PIO_STATUS_BLOCK iosb, NTSTATUS status, ULONG *total )
 {
     struct read_changes_info *info = user;
     char path[PATH_MAX];
diff --git a/dlls/ntdll/file.c b/dlls/ntdll/file.c
index 50ee3f77c52..9d6ed673c5d 100644
--- a/dlls/ntdll/file.c
+++ b/dlls/ntdll/file.c
@@ -334,7 +334,7 @@ NTSTATUS FILE_GetNtStatus(void)
 /***********************************************************************
  *             FILE_AsyncReadService      (INTERNAL)
  */
-static NTSTATUS FILE_AsyncReadService(void *user, PIO_STATUS_BLOCK iosb, NTSTATUS status, ULONG_PTR *total)
+static NTSTATUS FILE_AsyncReadService(void *user, PIO_STATUS_BLOCK iosb, NTSTATUS status, ULONG *total)
 {
     async_fileio_read *fileio = user;
     int fd, needs_close, result;
@@ -812,7 +812,7 @@ NTSTATUS WINAPI NtReadFileScatter( HANDLE file, HANDLE event, PIO_APC_ROUTINE ap
 /***********************************************************************
  *             FILE_AsyncWriteService      (INTERNAL)
  */
-static NTSTATUS FILE_AsyncWriteService(void *user, IO_STATUS_BLOCK *iosb, NTSTATUS status, ULONG_PTR *total)
+static NTSTATUS FILE_AsyncWriteService(void *user, IO_STATUS_BLOCK *iosb, NTSTATUS status, ULONG *total)
 {
     async_fileio_write *fileio = user;
     int result, fd, needs_close;
@@ -1146,7 +1146,7 @@ struct async_ioctl
 };
 
 /* callback for ioctl async I/O completion */
-static NTSTATUS ioctl_completion( void *arg, IO_STATUS_BLOCK *io, NTSTATUS status )
+static NTSTATUS ioctl_completion( void *arg, IO_STATUS_BLOCK *io, NTSTATUS status, ULONG *total )
 {
     struct async_ioctl *async = arg;
 
@@ -1158,7 +1158,7 @@ static NTSTATUS ioctl_completion( void *arg, IO_STATUS_BLOCK *io, NTSTATUS statu
             req->user_arg = async;
             wine_server_set_reply( req, async->buffer, async->size );
             if (!(status = wine_server_call( req )))
-                io->Information = wine_server_reply_size( reply );
+                io->Information = *total = wine_server_reply_size( reply );
         }
         SERVER_END_REQ;
     }
diff --git a/dlls/ntdll/ntdll_misc.h b/dlls/ntdll/ntdll_misc.h
index 63e121e8fd8..4474f2f9d01 100644
--- a/dlls/ntdll/ntdll_misc.h
+++ b/dlls/ntdll/ntdll_misc.h
@@ -211,6 +211,7 @@ static inline struct ntdll_thread_regs *ntdll_get_thread_regs(void)
 }
 
 /* Completion */
-extern NTSTATUS NTDLL_AddCompletion( HANDLE hFile, ULONG_PTR CompletionValue, NTSTATUS CompletionStatus, ULONG_PTR Information );
+extern NTSTATUS NTDLL_AddCompletion( HANDLE hFile, ULONG_PTR CompletionValue,
+                                     NTSTATUS CompletionStatus, ULONG Information );
 
 #endif
diff --git a/dlls/ntdll/sync.c b/dlls/ntdll/sync.c
index bad6eabf403..a2e36c4e1b5 100644
--- a/dlls/ntdll/sync.c
+++ b/dlls/ntdll/sync.c
@@ -1393,7 +1393,8 @@ NTSTATUS WINAPI NtQueryIoCompletion( HANDLE CompletionPort, IO_COMPLETION_INFORM
     return status;
 }
 
-NTSTATUS NTDLL_AddCompletion( HANDLE hFile, ULONG_PTR CompletionValue, NTSTATUS CompletionStatus, ULONG_PTR Information )
+NTSTATUS NTDLL_AddCompletion( HANDLE hFile, ULONG_PTR CompletionValue,
+                              NTSTATUS CompletionStatus, ULONG Information )
 {
     NTSTATUS status;
 
diff --git a/dlls/ws2_32/socket.c b/dlls/ws2_32/socket.c
index b05067af428..14f357fc1b5 100644
--- a/dlls/ws2_32/socket.c
+++ b/dlls/ws2_32/socket.c
@@ -1124,7 +1124,7 @@ static int WS2_recv( int fd, struct ws2_async *wsa )
  *
  * Handler for overlapped recv() operations.
  */
-static NTSTATUS WS2_async_recv( void* user, IO_STATUS_BLOCK* iosb, NTSTATUS status, ULONG_PTR *total )
+static NTSTATUS WS2_async_recv( void* user, IO_STATUS_BLOCK* iosb, NTSTATUS status, ULONG *total )
 {
     ws2_async* wsa = user;
     int result = 0, fd;
@@ -1225,7 +1225,7 @@ static int WS2_send( int fd, struct ws2_async *wsa )
  *
  * Handler for overlapped send() operations.
  */
-static NTSTATUS WS2_async_send(void* user, IO_STATUS_BLOCK* iosb, NTSTATUS status, ULONG_PTR *total )
+static NTSTATUS WS2_async_send(void* user, IO_STATUS_BLOCK* iosb, NTSTATUS status, ULONG *total )
 {
     ws2_async* wsa = user;
     int result = 0, fd;
@@ -1280,7 +1280,7 @@ static NTSTATUS WS2_async_send(void* user, IO_STATUS_BLOCK* iosb, NTSTATUS statu
  *
  * Handler for shutdown() operations on overlapped sockets.
  */
-static NTSTATUS WS2_async_shutdown( void* user, PIO_STATUS_BLOCK iosb, NTSTATUS status )
+static NTSTATUS WS2_async_shutdown( void* user, PIO_STATUS_BLOCK iosb, NTSTATUS status, ULONG *total )
 {
     ws2_async* wsa = user;
     int fd, err = 1;
@@ -1300,6 +1300,7 @@ static NTSTATUS WS2_async_shutdown( void* user, PIO_STATUS_BLOCK iosb, NTSTATUS
         status = err ? wsaErrno() : STATUS_SUCCESS;
         break;
     }
+    *total = 0;
     iosb->u.Status = status;
     return status;
 }
@@ -2647,7 +2648,8 @@ int WINAPI WS_select(int nfds, WS_fd_set *ws_readfds,
 }
 
 /* helper to send completion messages for client-only i/o operation case */
-static void WS_AddCompletion( SOCKET sock, ULONG_PTR CompletionValue, NTSTATUS CompletionStatus, ULONG_PTR Information )
+static void WS_AddCompletion( SOCKET sock, ULONG_PTR CompletionValue, NTSTATUS CompletionStatus,
+                              ULONG Information )
 {
     NTSTATUS status;
 
diff --git a/include/wine/server_protocol.h b/include/wine/server_protocol.h
index f69e7970d9b..129ca7ac01e 100644
--- a/include/wine/server_protocol.h
+++ b/include/wine/server_protocol.h
@@ -273,7 +273,7 @@ typedef union
     struct
     {
         enum apc_type    type;
-        unsigned int   (*func)(void*, void*, unsigned int, unsigned long *);
+        unsigned int   (*func)(void*, void*, unsigned int, unsigned int *);
         void            *user;
         void            *sb;
         unsigned int     status;
@@ -358,7 +358,7 @@ typedef union
     {
         enum apc_type    type;
         unsigned int     status;
-        unsigned long    total;
+        unsigned int     total;
     } async_io;
     struct
     {
@@ -4227,7 +4227,7 @@ struct add_completion_request
     obj_handle_t  handle;
     apc_param_t   ckey;
     apc_param_t   cvalue;
-    unsigned long information;
+    unsigned int  information;
     unsigned int  status;
 };
 struct add_completion_reply
@@ -4247,7 +4247,7 @@ struct remove_completion_reply
     struct reply_header __header;
     apc_param_t   ckey;
     apc_param_t   cvalue;
-    unsigned long information;
+    unsigned int  information;
     unsigned int  status;
 };
 
@@ -4286,7 +4286,7 @@ struct add_fd_completion_request
     obj_handle_t   handle;
     apc_param_t    cvalue;
     unsigned int   status;
-    unsigned long  information;
+    unsigned int   information;
 };
 struct add_fd_completion_reply
 {
diff --git a/server/async.c b/server/async.c
index 4466de2d91e..6dea6bc0176 100644
--- a/server/async.c
+++ b/server/async.c
@@ -234,7 +234,7 @@ void async_set_timeout( struct async *async, timeout_t timeout, unsigned int sta
 }
 
 /* store the result of the client-side async callback */
-void async_set_result( struct object *obj, unsigned int status, unsigned long total )
+void async_set_result( struct object *obj, unsigned int status, unsigned int total )
 {
     struct async *async = (struct async *)obj;
 
diff --git a/server/completion.c b/server/completion.c
index f9b8901e5e1..2a8f9ac2cc1 100644
--- a/server/completion.c
+++ b/server/completion.c
@@ -81,7 +81,7 @@ struct comp_msg
     struct   list queue_entry;
     apc_param_t   ckey;
     apc_param_t   cvalue;
-    unsigned long information;
+    unsigned int  information;
     unsigned int  status;
 };
 
@@ -142,7 +142,7 @@ struct completion *get_completion_obj( struct process *process, obj_handle_t han
 }
 
 void add_completion( struct completion *completion, apc_param_t ckey, apc_param_t cvalue,
-                     unsigned int status, unsigned long information )
+                     unsigned int status, unsigned int information )
 {
     struct comp_msg *msg = mem_alloc( sizeof( *msg ) );
 
diff --git a/server/file.h b/server/file.h
index 4255017845c..00b1fa7a4e0 100644
--- a/server/file.h
+++ b/server/file.h
@@ -125,7 +125,7 @@ extern struct object *create_dir_obj( struct fd *fd );
 
 extern struct completion *get_completion_obj( struct process *process, obj_handle_t handle, unsigned int access );
 extern void add_completion( struct completion *completion, apc_param_t ckey, apc_param_t cvalue,
-                            unsigned int status, unsigned long information );
+                            unsigned int status, unsigned int information );
 
 /* serial port functions */
 
@@ -138,7 +138,7 @@ extern void free_async_queue( struct async_queue *queue );
 extern struct async *create_async( struct thread *thread, struct async_queue *queue,
                                    const async_data_t *data );
 extern void async_set_timeout( struct async *async, timeout_t timeout, unsigned int status );
-extern void async_set_result( struct object *obj, unsigned int status, unsigned long total );
+extern void async_set_result( struct object *obj, unsigned int status, unsigned int total );
 extern int async_waiting( struct async_queue *queue );
 extern void async_terminate( struct async *async, unsigned int status );
 extern void async_wake_up( struct async_queue *queue, unsigned int status );
diff --git a/server/protocol.def b/server/protocol.def
index c99ea2e47e5..30654fae8fb 100644
--- a/server/protocol.def
+++ b/server/protocol.def
@@ -289,7 +289,7 @@ typedef union
     struct
     {
         enum apc_type    type;     /* APC_ASYNC_IO */
-        unsigned int   (*func)(void*, void*, unsigned int, unsigned long *);
+        unsigned int   (*func)(void*, void*, unsigned int, unsigned int *);
         void            *user;     /* user pointer */
         void            *sb;       /* status block */
         unsigned int     status;   /* I/O status */
@@ -374,7 +374,7 @@ typedef union
     {
         enum apc_type    type;      /* APC_ASYNC_IO */
         unsigned int     status;    /* new status of async operation */
-        unsigned long    total;     /* bytes transferred */
+        unsigned int     total;     /* bytes transferred */
     } async_io;
     struct
     {
@@ -3034,7 +3034,7 @@ enum message_type
     obj_handle_t  handle;         /* port handle */
     apc_param_t   ckey;           /* completion key */
     apc_param_t   cvalue;         /* completion value */
-    unsigned long information;    /* IO_STATUS_BLOCK Information */
+    unsigned int  information;    /* IO_STATUS_BLOCK Information */
     unsigned int  status;         /* completion result */
 @END
 
@@ -3045,7 +3045,7 @@ enum message_type
 @REPLY
     apc_param_t   ckey;           /* completion key */
     apc_param_t   cvalue;         /* completion value */
-    unsigned long information;    /* IO_STATUS_BLOCK Information */
+    unsigned int  information;    /* IO_STATUS_BLOCK Information */
     unsigned int  status;         /* completion result */
 @END
 
@@ -3071,7 +3071,7 @@ enum message_type
     obj_handle_t   handle;        /* async' object */
     apc_param_t    cvalue;        /* completion value */
     unsigned int   status;        /* completion status */
-    unsigned long  information;   /* IO_STATUS_BLOCK Information */
+    unsigned int   information;   /* IO_STATUS_BLOCK Information */
 @END
 
 
diff --git a/server/trace.c b/server/trace.c
index 31afbb0b1de..89dbb8c6ed6 100644
--- a/server/trace.c
+++ b/server/trace.c
@@ -3745,7 +3745,7 @@ static void dump_add_completion_request( const struct add_completion_request *re
     fprintf( stderr, " handle=%04x,", req->handle );
     fprintf( stderr, " ckey=%lx,", req->ckey );
     fprintf( stderr, " cvalue=%lx,", req->cvalue );
-    fprintf( stderr, " information=%lx,", req->information );
+    fprintf( stderr, " information=%08x,", req->information );
     fprintf( stderr, " status=%08x", req->status );
 }
 
@@ -3758,7 +3758,7 @@ static void dump_remove_completion_reply( const struct remove_completion_reply *
 {
     fprintf( stderr, " ckey=%lx,", req->ckey );
     fprintf( stderr, " cvalue=%lx,", req->cvalue );
-    fprintf( stderr, " information=%lx,", req->information );
+    fprintf( stderr, " information=%08x,", req->information );
     fprintf( stderr, " status=%08x", req->status );
 }
 
@@ -3784,7 +3784,7 @@ static void dump_add_fd_completion_request( const struct add_fd_completion_reque
     fprintf( stderr, " handle=%04x,", req->handle );
     fprintf( stderr, " cvalue=%lx,", req->cvalue );
     fprintf( stderr, " status=%08x,", req->status );
-    fprintf( stderr, " information=%lx", req->information );
+    fprintf( stderr, " information=%08x", req->information );
 }
 
 static void dump_get_window_layered_info_request( const struct get_window_layered_info_request *req )
diff --git a/tools/make_requests b/tools/make_requests
index 2203e5ac300..5d8103e5318 100755
--- a/tools/make_requests
+++ b/tools/make_requests
@@ -29,7 +29,6 @@ my %formats =
     "unsigned char" => [  1,   1,  "%02x" ],
     "unsigned short"=> [  2,   2,  "%04x" ],
     "unsigned int"  => [  4,   4,  "%08x" ],
-    "unsigned long" => [  4,   4,  "%lx" ],
     "void*"         => [  4,   4,  "%p" ],
     "data_size_t"   => [  4,   4,  "%u" ],
     "obj_handle_t"  => [  4,   4,  "%04x" ],