diff --git a/AppKit/CPTextView/CPTextView.j b/AppKit/CPTextView/CPTextView.j
index 50169b091..e427a2804 100644
--- a/AppKit/CPTextView/CPTextView.j
+++ b/AppKit/CPTextView/CPTextView.j
@@ -3294,7 +3294,7 @@ var _CPCopyPlaceholder = '-';
         var currentFirstResponder = [[CPApp keyWindow] firstResponder];
 
         // Can we accept richtext? Then this is our preference (fixme: shift key to force plain text paste)
-        if ([currentFirstResponder isRichText])
+        if ([currentFirstResponder respondsToSelector:@selector(isRichText)] && [currentFirstResponder isRichText])
         {
             var richtext = nativeClipboard.getData('text/rtf');