diff --git a/public/css/icinga/tabs.less b/public/css/icinga/tabs.less
index 4d7f43146..d9161f672 100644
--- a/public/css/icinga/tabs.less
+++ b/public/css/icinga/tabs.less
@@ -142,7 +142,7 @@ a.close-tab {
 }
 
 .spinner.active > i  {
-  .animate-spin();
+  .animate(spin 2s infinite linear);
   &:before {
     // icon-spin6
     content: '\e874';