1 files changed, 1 insertions, 2 deletions
diff --git a/vm.c b/vm.c
index e04a44b696..67ca4393a5 100644
--- a/vm.c
+++ b/vm.c
@@ -1912,8 +1912,7 @@ vm_define_method(rb_thread_t *th, VALUE obj, ID id, VALUE iseqval,
     GetISeqPtr(iseqval, miseq);
 
     if (miseq->klass) {
-	iseqval = rb_iseq_clone(iseqval, 0);
-	RB_GC_GUARD(iseqval);
+	RB_GC_GUARD(iseqval) = rb_iseq_clone(iseqval, 0);
 	GetISeqPtr(iseqval, miseq);
     }