diff --git a/src/Umbraco.Web.UI.Client/lib/bootstrap/less/alerts.less b/src/Umbraco.Web.UI.Client/lib/bootstrap/less/alerts.less
index c999481032..0116b191b3 100644
--- a/src/Umbraco.Web.UI.Client/lib/bootstrap/less/alerts.less
+++ b/src/Umbraco.Web.UI.Client/lib/bootstrap/less/alerts.less
@@ -77,20 +77,3 @@
 .alert-block p + p {
   margin-top: 5px;
 }
-
-
-// Property error alerts
-// -------------------------
-.alert.property-error {
-    &::after {
-        content:'';
-        position: absolute;
-        bottom:0;
-        left: 32px;
-        width: 0;
-        height: 0;
-        border-left: 8px solid transparent;
-        border-right: 8px solid transparent;
-        border-top: 8px solid @warningBackground;
-    }
-}