diff --git a/core/state.py b/core/state.py
index 3a820d43d..533a2b2ea 100644
--- a/core/state.py
+++ b/core/state.py
@@ -1338,7 +1338,7 @@ def Dump(self):
                     _AddCallToken(d, frame.call_tok)
 
             # Note: Skip debug_frame.MainFile
-            if d:
+            if d is not None:
                 debug_stack.append(value.Dict(d))
 
         return var_stack, argv_stack, debug_stack