diff --git a/resources/ext.popups.animation.less b/resources/ext.popups.animation.less
index 2dd335fb2..f12d15c81 100644
--- a/resources/ext.popups.animation.less
+++ b/resources/ext.popups.animation.less
@@ -6,12 +6,11 @@
 	transform: translate(@x, @y);
 }
 
-.mwe-popups-animation ( @name, @duration ) {
-	-webkit-animation: @name @duration;
-	-moz-animation: @name @duration;
-	-ms-animation: @name @duration;
-	-o-animation: @name @duration;
-	animation: @name @duration;
+.mwe-popups-animation ( ... ) {
+	-webkit-animation: @arguments;
+	-moz-animation: @arguments;
+	-o-animation: @arguments;
+	animation: @arguments;
 }
 
 @-webkit-keyframes mwe-popups-fade-in {