diff --git a/mrbgems/mruby-compiler/core/parse.y b/mrbgems/mruby-compiler/core/parse.y
index 61b6ea2145..2c1a943be9 100644
--- a/mrbgems/mruby-compiler/core/parse.y
+++ b/mrbgems/mruby-compiler/core/parse.y
@@ -3474,11 +3474,12 @@ void_expr_error(parser_state *p, node *n)
     void_expr_error(p, n->cdr->cdr);
     break;
   case NODE_BEGIN:
-    n = n->cdr;
-    while (n->cdr) {
-      n = n->cdr;
+    if (n->cdr) {
+      while (n->cdr) {
+        n = n->cdr;
+      }
+      void_expr_error(p, n->car);
     }
-    void_expr_error(p, n->car);
     break;
   default:
     break;