1 files changed, 1 insertions, 1 deletions
diff --git a/insns.def b/insns.def
index eb5b4dec9e..679927b4e9 100644
--- a/insns.def
+++ b/insns.def
@@ -1250,7 +1250,7 @@ once
 	}
 	else if (is->once.running_thread == th) {
 	    /* recursive once */
-	    val = vm_once_exec(iseq);
+	    val = vm_once_exec((VALUE)iseq);
 	}
 	else {
 	    /* waiting for finish */