diff --git a/programs/services/rpc.c b/programs/services/rpc.c
index a657492a5f6..0f2c1440c23 100644
--- a/programs/services/rpc.c
+++ b/programs/services/rpc.c
@@ -19,6 +19,7 @@
  */
 
 #define WIN32_LEAN_AND_MEAN
+#define NONAMELESSSTRUCT
 #define NONAMELESSUNION
 
 #include <stdarg.h>
@@ -1133,6 +1134,8 @@ static BOOL process_send_command(struct process_entry *process, const void *data
     DWORD count, ret;
     BOOL r;
 
+    overlapped.u.s.Offset = 0;
+    overlapped.u.s.OffsetHigh = 0;
     overlapped.hEvent = process->overlapped_event;
     r = WriteFile(process->control_pipe, data, size, &count, &overlapped);
     if (!r && GetLastError() == ERROR_IO_PENDING)