diff --git a/Source/NSGSet.m b/Source/NSGSet.m
index b6c7550e3..607bfc253 100644
--- a/Source/NSGSet.m
+++ b/Source/NSGSet.m
@@ -81,7 +81,7 @@
 
 - member: anObject
 {
-  [self containsObject: anObject];
+  return ([self containsObject: anObject] ? anObject : nil);
 }
 
 - (NSEnumerator*) objectEnumerator