diff --git a/ng2-components/ng2-alfresco-viewer/src/pdfViewer.component.html b/ng2-components/ng2-alfresco-viewer/src/pdfViewer.component.html
index dc7a61dacd..8d2007d9e1 100644
--- a/ng2-components/ng2-alfresco-viewer/src/pdfViewer.component.html
+++ b/ng2-components/ng2-alfresco-viewer/src/pdfViewer.component.html
@@ -35,10 +35,10 @@
     <div id="viewer-scale-page-button" class="button-page left" (click)="pageFit()">
         <i class="icon material-icons">zoom_out_map</i>
     </div>
-    <div id="viewer-scale-page-button" class="button-page left" (click)="zoomIn()">
+    <div id="viewer-zoom-in-button" class="button-page left" (click)="zoomIn()">
         <i class="icon material-icons">zoom_in</i>
     </div>
-    <div id="viewer-scale-page-button" class="button-page left" (click)="zoomOut()">
+    <div id="viewer-zoom-out-button" class="button-page left" (click)="zoomOut()">
         <i class="icon material-icons">zoom_out</i>
     </div>
 </div>