diff --git a/gc.c b/gc.c
index 9ff2da545c..5ee5adbdb3 100644
--- a/gc.c
+++ b/gc.c
@@ -9208,9 +9208,10 @@ static void
 rb_raw_iseq_info(char *buff, const int buff_size, const rb_iseq_t *iseq)
 {
     if (iseq->body->location.label) {
+	VALUE path = rb_iseq_path(iseq);
 	snprintf(buff, buff_size, "%s %s@%s:%d", buff,
 		 RSTRING_PTR(iseq->body->location.label),
-		 RSTRING_PTR(rb_iseq_path(iseq)),
+		 RSTRING_PTR(path),
 		 FIX2INT(iseq->body->location.first_lineno));
     }
 }