diff --git a/AppKit/CPFontManager.j b/AppKit/CPFontManager.j
index f2159359d..d10a27e44 100644
--- a/AppKit/CPFontManager.j
+++ b/AppKit/CPFontManager.j
@@ -208,7 +208,11 @@ CPRemoveTraitFontAction = 7;
 
 - (@action)addFontTrait:(id)sender
 {
-    var tag = [sender tag];
+    var tag = sender;
+
+    if ([sender respondsToSelector:@selector(tag)])
+        tag = [sender tag];
+
     _activeChange = tag == nil ? @{} : @{ @"addTraits": tag };
     _fontAction = CPAddTraitFontAction;