diff --git a/dlls/quartz/filtergraph.c b/dlls/quartz/filtergraph.c
index dbb40485c0e..bbf22e613bb 100644
--- a/dlls/quartz/filtergraph.c
+++ b/dlls/quartz/filtergraph.c
@@ -3979,7 +3979,7 @@ static HRESULT WINAPI MediaEvent_SetNotifyFlags(IMediaEventEx *iface,
 
     TRACE("(%p/%p)->(%ld)\n", This, iface, lNoNotifyFlags);
 
-    if ((lNoNotifyFlags != 0) || (lNoNotifyFlags != 1))
+    if ((lNoNotifyFlags != 0) && (lNoNotifyFlags != 1))
 	return E_INVALIDARG;
 
     This->notif.disabled = lNoNotifyFlags;