diff --git a/src/effects.js b/src/effects.js
index f6b6dbd77..223c8e549 100644
--- a/src/effects.js
+++ b/src/effects.js
@@ -116,7 +116,7 @@ function createTween( value, prop, animation ) {
 
 function defaultPrefilter( elem, props, opts ) {
 	/* jshint validthis: true */
-	var prop, value, toggle, tween, hooks, oldfire, display, dDisplay,
+	var prop, value, toggle, tween, hooks, oldfire, display,
 		anim = this,
 		orig = {},
 		style = elem.style,
@@ -166,7 +166,7 @@ function defaultPrefilter( elem, props, opts ) {
 
 			// inline-level elements accept inline-block;
 			// block-level elements need to be inline with layout
-			if ( !support.inlineBlockNeedsLayout || dDisplay === "inline" ) {
+			if ( !support.inlineBlockNeedsLayout || defaultDisplay( elem.nodeName ) === "inline" ) {
 				style.display = "inline-block";
 			} else {
 				style.zoom = 1;