diff --git a/src/ol/control/zoom.js b/src/ol/control/zoom.js
index 716150a044..f5e493cf2b 100644
--- a/src/ol/control/zoom.js
+++ b/src/ol/control/zoom.js
@@ -1,3 +1,5 @@
+// FIXME: remove constraints from here
+
 goog.provide('ol.control.Zoom');
 
 goog.require('goog.dom');