diff --git a/tests/lib/qunit-assert-domequal.js b/tests/lib/qunit-assert-domequal.js
index b22bd90b9..35695c4f1 100644
--- a/tests/lib/qunit-assert-domequal.js
+++ b/tests/lib/qunit-assert-domequal.js
@@ -59,6 +59,12 @@ domEqual.attributes = [
 	"title"
 ];
 
+function camelCase( string ) {
+	return string.replace( /-([\da-z])/gi, function( all, letter ) {
+		return letter.toUpperCase();
+	} );
+}
+
 function getElementStyles( elem ) {
 	var styles = {};
 	var style = elem.ownerDocument.defaultView ?
@@ -71,7 +77,7 @@ function getElementStyles( elem ) {
 		while ( len-- ) {
 			key = style[ len ];
 			if ( typeof style[ key ] === "string" ) {
-				styles[ $.camelCase( key ) ] = style[ key ];
+				styles[ camelCase( key ) ] = style[ key ];
 			}
 		}
 
diff --git a/ui/effect.js b/ui/effect.js
index 31e6024a1..2d17affd1 100644
--- a/ui/effect.js
+++ b/ui/effect.js
@@ -746,6 +746,12 @@ $.each(
 	}
 );
 
+function camelCase( string ) {
+	return string.replace( /-([\da-z])/gi, function( all, letter ) {
+		return letter.toUpperCase();
+	} );
+}
+
 function getElementStyles( elem ) {
 	var key, len,
 		style = elem.ownerDocument.defaultView ?
@@ -758,7 +764,7 @@ function getElementStyles( elem ) {
 		while ( len-- ) {
 			key = style[ len ];
 			if ( typeof style[ key ] === "string" ) {
-				styles[ $.camelCase( key ) ] = style[ key ];
+				styles[ camelCase( key ) ] = style[ key ];
 			}
 		}