diff --git a/UI/Templates/MailerUI/UIxMailViewTemplate.wox b/UI/Templates/MailerUI/UIxMailViewTemplate.wox
index 9746f86fc..775fcfe2b 100644
--- a/UI/Templates/MailerUI/UIxMailViewTemplate.wox
+++ b/UI/Templates/MailerUI/UIxMailViewTemplate.wox
@@ -65,7 +65,7 @@
             <md-tooltip md-direction="bottom"><var:string label:value="Delete selected message or folder"/></md-tooltip>
             <md-icon>delete</md-icon>
           </md-button>
-          <md-button class="sg-icon-button hide show-gt-md" label:aria-label="Open in New Mail Window"
+          <md-button class="sg-icon-button hide show-gt-md" label:aria-label="'Open in New Mail Window'.asSafeJSString"
                      ng-hide="::isPopup"
                      ng-click="viewer.openPopup()">
             <md-tooltip md-direction="bottom"><var:string label:value="Open in New Mail Window"/></md-tooltip>