diff --git a/rsqueakvm/interpreter_bytecodes.py b/rsqueakvm/interpreter_bytecodes.py
index 338a581a..0a50c29d 100644
--- a/rsqueakvm/interpreter_bytecodes.py
+++ b/rsqueakvm/interpreter_bytecodes.py
@@ -372,6 +372,7 @@ def _sendSpecialSelector(self, interp, receiver, special_selector, w_args=[]):
         w_method = s_class.lookup(w_special_selector)
         if w_method is None:
             w_method = s_class.lookup(space.w_doesNotUnderstand)
+            self.push(receiver) # need to put receiver back on stack
             if w_method is None:
                 s_class = receiver.class_shadow(self.space)
                 assert isinstance(s_class, ClassShadow)