diff --git a/src/plugin/leaflet.canvas-markers.js b/src/plugin/leaflet.canvas-markers.js
index 9da4211..51937a8 100644
--- a/src/plugin/leaflet.canvas-markers.js
+++ b/src/plugin/leaflet.canvas-markers.js
@@ -298,7 +298,7 @@ function layerFactory(L) {
             }
         },
         _onMouseMove: function (e) {
-            if (!this._map || this._map.dragging.moving() || this._map._animatingZoom) { return; }
+            if (!this._map || !this._markers || this._map.dragging.moving() || this._map._animatingZoom) { return; }
 
             var point = e.containerPoint;
             this._handleMouseHover(e, point);