1 files changed, 1 insertions, 1 deletions
diff --git a/proc.c b/proc.c
index 1a67a63663..09b288fecd 100644
--- a/proc.c
+++ b/proc.c
@@ -1050,7 +1050,7 @@ rb_iseq_min_max_arity(const rb_iseq_t *iseq, int *max)
 {
     *max = ISEQ_BODY(iseq)->param.flags.has_rest == FALSE ?
       ISEQ_BODY(iseq)->param.lead_num + ISEQ_BODY(iseq)->param.opt_num + ISEQ_BODY(iseq)->param.post_num +
-      (ISEQ_BODY(iseq)->param.flags.has_kw == TRUE || ISEQ_BODY(iseq)->param.flags.has_kwrest == TRUE)
+      (ISEQ_BODY(iseq)->param.flags.has_kw == TRUE || ISEQ_BODY(iseq)->param.flags.has_kwrest == TRUE || ISEQ_BODY(iseq)->param.flags.forwardable == TRUE)
       : UNLIMITED_ARGUMENTS;
     return ISEQ_BODY(iseq)->param.lead_num + ISEQ_BODY(iseq)->param.post_num + (ISEQ_BODY(iseq)->param.flags.has_kw && ISEQ_BODY(iseq)->param.keyword->required_num > 0);
 }