1 files changed, 1 insertions, 1 deletions
diff --git a/proc.c b/proc.c
index 5ed3c0184c..b7c632c856 100644
--- a/proc.c
+++ b/proc.c
@@ -902,7 +902,7 @@ mnew(VALUE klass, VALUE obj, ID id, VALUE mclass, int scope)
 	VALUE sym = ID2SYM(id);
 
 	if (obj != Qundef && !rb_method_basic_definition_p(klass, rmiss)) {
-	    if (RTEST(rb_funcall(obj, rmiss, 1, sym))) {
+	    if (RTEST(rb_funcall(obj, rmiss, 2, sym, Qtrue))) {
 		def = ALLOC(rb_method_definition_t);
 		def->type = VM_METHOD_TYPE_MISSING;
 		def->original_id = id;