1 files changed, 1 insertions, 0 deletions
diff --git a/vm_core.h b/vm_core.h
index 1838f2a099..286831feba 100644
--- a/vm_core.h
+++ b/vm_core.h
@@ -273,6 +273,7 @@ struct rb_iseq_struct {
     int arg_keyword;
     int arg_keyword_check; /* if this is true, raise an ArgumentError when unknown keyword argument is passed */
     int arg_keywords;
+    int arg_keyword_required;
     ID *arg_keyword_table;
 
     size_t stack_max; /* for stack overflow check */