diff --git a/Source/NSString.m b/Source/NSString.m
index d706fa787..e2b20d350 100644
--- a/Source/NSString.m
+++ b/Source/NSString.m
@@ -2784,6 +2784,11 @@ else
   return self;
 }
 
+- (NSZone*) zone
+{
+  return NSDefaultMallocZone();
+}
+
 - (NSStringEncoding) fastestEncoding
 {
   return NSASCIIStringEncoding;