diff --git a/mozilla/xpcom/string/public/nsTString.h b/mozilla/xpcom/string/public/nsTString.h
index 3c09c2fe461..59dc35eb05d 100644
--- a/mozilla/xpcom/string/public/nsTString.h
+++ b/mozilla/xpcom/string/public/nsTString.h
@@ -441,7 +441,7 @@ class nsTString_CharT : public nsTSubstring_CharT
          */
       NS_COM void AppendInt( PRUint32 aInteger, PRInt32 aRadix = kRadix10 )
         {
-          return AppendInt(PRInt32(aInteger), aRadix);
+          AppendInt(PRInt32(aInteger), aRadix);
         }
 
         /**