diff --git a/mrbgems/mruby-compiler/core/codegen.c b/mrbgems/mruby-compiler/core/codegen.c
index bf18106e8d..052371dbe9 100644
--- a/mrbgems/mruby-compiler/core/codegen.c
+++ b/mrbgems/mruby-compiler/core/codegen.c
@@ -2830,7 +2830,8 @@ codegen(codegen_scope *s, node *tree, int val)
         st++;
       }
       else {
-        gen_blkmove(s, s2->ainfo, lv);
+        if (!s2) push();
+        else gen_blkmove(s, s2->ainfo, lv);
         st++;
       }
       pop_n(st+1);