diff --git a/masks/template.html b/masks/template.html
index 3d01ba5..ace6f14 100644
--- a/masks/template.html
+++ b/masks/template.html
@@ -14,7 +14,7 @@
 				</div>
 			</div>
 			<a tabindex="0" class="body btn btn-outline-primary ml-2 my-0" role="button" data-toggle="popover"><i class="fa-body"></i></a>
-			<button class="sync btn btn-outline-primary ml-2 my-0" type="button"><i class="fa-sync"></i></button>
+			<button class="sync btn btn-outline-primary ml-2 my-0" type="button" data-toggle="tooltip" title="Sync local server with lutran.ch"><i class="fa-sync"></i></button>
 			<button class="home btn btn-outline-primary ml-2 my-0" type="button"><i class="fa-home"></i></button>
 			<button class="logoff btn btn-outline-primary ml-2 my-0" type="button" data-toggle="modal" data-target="#log-off"><i class="fa-logoff"></i></button>
 		</form>