diff --git a/Tools/XcodeCapp/FSEventCallback.m b/Tools/XcodeCapp/FSEventCallback.m
index 9df1fd56a..e050e8d8b 100644
--- a/Tools/XcodeCapp/FSEventCallback.m
+++ b/Tools/XcodeCapp/FSEventCallback.m
@@ -79,7 +79,7 @@ void fsevents_callback(ConstFSEventStreamRef streamRef,
                       flags & kFSEventStreamEventFlagItemXattrMod      ||
                       flags & kFSEventStreamEventFlagItemChangeOwner))
             {
-                DLog(@"event type: %@ for path %@", flags, path);
+                DLog(@"event type: %u for path %@", flags, path);
                 [xcc handleFileModification:path notify:YES];
             }