diff --git a/dlls/avrt/main.c b/dlls/avrt/main.c
index 5c9ef4a29b8..8a110250aea 100644
--- a/dlls/avrt/main.c
+++ b/dlls/avrt/main.c
@@ -86,11 +86,11 @@ HANDLE WINAPI AvSetMmThreadCharacteristicsW(LPCWSTR TaskName, LPDWORD TaskIndex)
 BOOL WINAPI AvRevertMmThreadCharacteristics(HANDLE AvrtHandle)
 {
     FIXME("(%p): stub\n", AvrtHandle);
-    return 1;
+    return TRUE;
 }
 
 BOOL WINAPI AvSetMmThreadPriority(HANDLE AvrtHandle, AVRT_PRIORITY prio)
 {
     FIXME("(%p)->(%u) stub\n", AvrtHandle, prio);
-    return 1;
+    return TRUE;
 }