diff --git a/winsup/w32api/include/winbase.h b/winsup/w32api/include/winbase.h
index 829bf64dd..069bbd7e8 100644
--- a/winsup/w32api/include/winbase.h
+++ b/winsup/w32api/include/winbase.h
@@ -185,7 +185,7 @@ extern "C" {
 #define FILE_FLAG_POSIX_SEMANTICS	16777216
 #define FILE_FLAG_OPEN_REPARSE_POINT	2097152
 #define FILE_FLAG_OPEN_NO_RECALL	1048576
-#if (_WIN32_WINNT >= 0x0500) /* Needs win2k sp2 or XP or later */
+#if (_WIN32_WINNT >= 0x0500)
 #define FILE_FLAG_FIRST_PIPE_INSTANCE	524288
 #endif
 #define CLRDTR 6