diff --git a/reactos/w32api/include/ddk/winddk.h b/reactos/w32api/include/ddk/winddk.h
index 8be213b4c51..bc8f1b2e6ba 100644
--- a/reactos/w32api/include/ddk/winddk.h
+++ b/reactos/w32api/include/ddk/winddk.h
@@ -101,6 +101,8 @@ DECLARE_INTERNAL_OBJECT(SECTION_OBJECT)
 /* FIXME: Unknown definitions */
 struct _SET_PARTITION_INFORMATION_EX;
 typedef ULONG WAIT_TYPE;
+#define WaitAll 0
+#define WaitAny 1
 typedef HANDLE TRACEHANDLE;
 typedef PVOID PWMILIB_CONTEXT;
 typedef PVOID PSYSCTL_IRP_DISPOSITION;