diff --git a/js/jquery.mobile.transition.outin.js b/js/jquery.mobile.transition.outin.js
index 6755973a..eddc7a7e 100644
--- a/js/jquery.mobile.transition.outin.js
+++ b/js/jquery.mobile.transition.outin.js
@@ -87,4 +87,9 @@ if ( $.mobile.defaultTransitionHandler === $.mobile.noneTransitionHandler ) {
 	$.mobile.defaultTransitionHandler = outInTransitionHandler;
 }
 
+// add class for where 3d transforms are supported, or not
+if( $.support.cssTransform3d ){
+	$( "html" ).addClass( $.support.cssTransform3d ? "ui-supported-cssTransform3d" : "ui-unsupported-cssTransform3d" );
+}
+
 })( jQuery, this );