diff --git a/dlls/ole32/compobj.c b/dlls/ole32/compobj.c
index 452ea0d859d..f1c6ebe7c7a 100644
--- a/dlls/ole32/compobj.c
+++ b/dlls/ole32/compobj.c
@@ -41,7 +41,6 @@
 
 #include "config.h"
 
-#include <stdlib.h>
 #include <stdarg.h>
 #include <stdio.h>
 #include <string.h>
@@ -1677,7 +1676,7 @@ HRESULT WINAPI CoRevokeClassObject(
         LARGE_INTEGER zero;
         memset(&zero, 0, sizeof(zero));
         /* FIXME: stop local server thread */
-        IStream_Seek(curClass->pMarshaledData, zero, SEEK_SET, NULL);
+        IStream_Seek(curClass->pMarshaledData, zero, STREAM_SEEK_SET, NULL);
         CoReleaseMarshalData(curClass->pMarshaledData);
       }
 
diff --git a/dlls/ole32/git.c b/dlls/ole32/git.c
index 4f8d17d4c6b..222eb6f375f 100644
--- a/dlls/ole32/git.c
+++ b/dlls/ole32/git.c
@@ -24,13 +24,7 @@
  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  */
 
-#include "config.h"
-
-#include <assert.h>
-#include <stdlib.h>
 #include <stdarg.h>
-#include <stdio.h>
-#include <string.h>
 
 #define COBJMACROS
 #define NONAMELESSUNION
@@ -42,8 +36,6 @@
 #include "objbase.h"
 #include "ole2.h"
 #include "winerror.h"
-#include "winreg.h"
-#include "winternl.h"
 
 #include "compobj_private.h" 
 
@@ -208,7 +200,7 @@ StdGlobalInterfaceTable_RegisterInterfaceInGlobal(
   }
 
   zero.QuadPart = 0;
-  IStream_Seek(stream, zero, SEEK_SET, NULL);
+  IStream_Seek(stream, zero, STREAM_SEEK_SET, NULL);
 
   entry = HeapAlloc(GetProcessHeap(), 0, sizeof(StdGITEntry));
   if (entry == NULL) return E_OUTOFMEMORY;
diff --git a/dlls/ole32/marshal.c b/dlls/ole32/marshal.c
index dd504864334..01368cbd04a 100644
--- a/dlls/ole32/marshal.c
+++ b/dlls/ole32/marshal.c
@@ -20,11 +20,7 @@
  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  */
 
-#include "config.h"
-
-#include <stdlib.h>
 #include <stdarg.h>
-#include <stdio.h>
 #include <string.h>
 #include <assert.h>
 
@@ -35,10 +31,7 @@
 #include "winuser.h"
 #include "objbase.h"
 #include "ole2.h"
-#include "rpc.h"
 #include "winerror.h"
-#include "winreg.h"
-#include "wtypes.h"
 #include "wine/unicode.h"
 
 #include "compobj_private.h"
@@ -1780,7 +1773,7 @@ HRESULT WINAPI CoMarshalInterThreadInterfaceInStream(
     if (SUCCEEDED(hres))
     {
         memset(&seekto, 0, sizeof(seekto));
-        IStream_Seek(*ppStm, seekto, SEEK_SET, &xpos);
+        IStream_Seek(*ppStm, seekto, STREAM_SEEK_SET, &xpos);
     }
     else
     {
diff --git a/dlls/ole32/rpc.c b/dlls/ole32/rpc.c
index f063883406a..d28241b4b31 100644
--- a/dlls/ole32/rpc.c
+++ b/dlls/ole32/rpc.c
@@ -23,11 +23,8 @@
 #include "config.h"
 #include "wine/port.h"
 
-#include <stdlib.h>
 #include <stdarg.h>
-#include <stdio.h>
 #include <string.h>
-#include <assert.h>
 
 #define COBJMACROS
 #define NONAMELESSUNION
@@ -42,7 +39,6 @@
 #include "rpc.h"
 #include "winerror.h"
 #include "winreg.h"
-#include "wtypes.h"
 #include "wine/unicode.h"
 
 #include "compobj_private.h"
diff --git a/dlls/ole32/stubmanager.c b/dlls/ole32/stubmanager.c
index 264a2e56214..3665443a6d5 100644
--- a/dlls/ole32/stubmanager.c
+++ b/dlls/ole32/stubmanager.c
@@ -35,9 +35,8 @@
 #include "winbase.h"
 #include "winuser.h"
 #include "objbase.h"
-#include "ole2.h"
-#include "ole2ver.h"
 #include "rpc.h"
+
 #include "wine/debug.h"
 #include "compobj_private.h"