diff --git a/Source/NSObject.m b/Source/NSObject.m
index dde46a667..cedadb93e 100644
--- a/Source/NSObject.m
+++ b/Source/NSObject.m
@@ -505,6 +505,11 @@ BOOL NSDecrementExtraRefCountWasZero(id anObject)
   return [self perform:sel withObject:anObject];
 }
 
+- perform: (SEL)sel with: anObject with: anotherObject
+{
+  return [self perform:sel withObject:anObject withObject:anotherObject];
+}
+
 @end
 
 @implementation NSObject (GNU)