diff --git a/Source/NSProxy.m b/Source/NSProxy.m
index 24df1e37e..49a364266 100644
--- a/Source/NSProxy.m
+++ b/Source/NSProxy.m
@@ -145,6 +145,11 @@
   return (self == anObject);
 }
 
++ (BOOL) isKindOfClass: (Class)aClass
+{
+  return NO;
+}
+
 - (BOOL) isKindOfClass: (Class)aClass
 {
   Class class = self->isa;
@@ -160,6 +165,11 @@
   return NO;
 }
 
++ (BOOL) isMemberOfClass: (Class)aClass
+{
+  return(self == aClass);
+}
+
 - (BOOL) isMemberOfClass: (Class)aClass
 {
   return(self->isa == aClass);