diff --git a/tools/widl/header.c b/tools/widl/header.c
index 9d1269616ed..4dee484a7d9 100644
--- a/tools/widl/header.c
+++ b/tools/widl/header.c
@@ -1338,6 +1338,11 @@ void write_header(const statement_list_t *stmts)
   fprintf(header, "#include <rpc.h>\n" );
   fprintf(header, "#include <rpcndr.h>\n\n" );
 
+  fprintf(header, "#if !defined(COM_NO_WINDOWS_H) && !defined(__WINESRC__)\n");
+  fprintf(header, "#include <windows.h>\n");
+  fprintf(header, "#include <ole2.h>\n");
+  fprintf(header, "#endif\n\n");
+
   fprintf(header, "#ifndef __WIDL_%s\n", header_token);
   fprintf(header, "#define __WIDL_%s\n\n", header_token);