diff --git a/src/module.html b/src/module.html
index 3082ab4..dd55b5f 100644
--- a/src/module.html
+++ b/src/module.html
@@ -2,8 +2,8 @@
 	<div class="status-heatmap-canvas-wrapper">
 
 		<div class="datapoints-warning">
-			<span class="small" ng-if="ctrl.multipleValues" bs-tooltip="{{ctrl.dataWarnings.multipleValues.tip}}">{{ctrl.dataWarnings.multipleValues.title}}</span>
-			<span class="small" ng-if="ctrl.noColorDefined" bs-tooltip="{{ctrl.dataWarnings.noColorDefined.tip}}">{{ctrl.dataWarnings.noColorDefined.title}}</span>
+			<span class="small" ng-if="ctrl.multipleValues" bs-tooltip="'{{ctrl.dataWarnings.multipleValues.tip}}'">{{ctrl.dataWarnings.multipleValues.title}}</span>
+			<span class="small" ng-if="ctrl.noColorDefined" bs-tooltip="'{{ctrl.dataWarnings.noColorDefined.tip}}'">{{ctrl.dataWarnings.noColorDefined.title}}</span>
 		</div>
 
 		<div class="status-heatmap-panel" ng-dblclick="ctrl.zoomOut()"></div>