diff --git a/py/scope.c b/py/scope.c
index 7f84410..d72d130 100644
--- a/py/scope.c
+++ b/py/scope.c
@@ -52,6 +52,7 @@
     scope->num_dict_params = 0;
     */
     scope->num_locals = 0;
+    scope->num_cells = 0;
     scope->unique_code_id = unique_code_id;
     scope->emit_options = emit_options;