diff --git a/render/render.js b/render/render.js
index 578974cdd..a31d19346 100644
--- a/render/render.js
+++ b/render/render.js
@@ -675,7 +675,7 @@ module.exports = function() {
 			setAttr(vnode, key, null, attrs[key], ns)
 		}
 	}
-	function setAttr(vnode, key, old, value, ns, isFileInput) {
+	function setAttr(vnode, key, old, value, ns) {
 		if (key === "key" || key === "is" || value == null || isLifecycleMethod(key) || (old === value && !isFormAttribute(vnode, key)) && typeof value !== "object") return
 		if (key[0] === "o" && key[1] === "n") return updateEvent(vnode, key, value)
 		if (key.slice(0, 6) === "xlink:") vnode.dom.setAttributeNS("http://www.w3.org/1999/xlink", key.slice(6), value)