diff --git a/mozilla/xpcom/string/public/nsTAString.h b/mozilla/xpcom/string/public/nsTAString.h
index 52a0e337174..b2fba91a9ed 100644
--- a/mozilla/xpcom/string/public/nsTAString.h
+++ b/mozilla/xpcom/string/public/nsTAString.h
@@ -457,7 +457,7 @@ class nsTAString_CharT
         // default because that might tempt people into using it (where it
         // would be invalid).
 #if !defined(__SUNPRO_CC) && \
-    !defined(__GNUC__) || __GNUC__ > 2 || __GNUC_MINOR__ > 95
+   (!defined(__GNUC__) || __GNUC__ > 2 || __GNUC_MINOR__ > 95)
 
         // NOT TO BE IMPLEMENTED
       nsTAString_CharT( const self_type& );