diff --git a/src/MarkerCluster.js b/src/MarkerCluster.js
index c98715bbf..5b879058b 100644
--- a/src/MarkerCluster.js
+++ b/src/MarkerCluster.js
@@ -388,9 +388,6 @@ L.MarkerCluster = L.Marker.extend({
 			clusters = res.clusters,
 			i;
 
-		var oldMarkers = this._markers;
-		var old = this._childCount;
-
 		this._markers = [];
 		this._childCount = 0;
 
@@ -401,10 +398,6 @@ L.MarkerCluster = L.Marker.extend({
 			this._addChild(clusters[i]);
 		}
 
-		if (this._childCount != old) {
-			debugger;
-		}
-
 		delete this._zoomForCluster;
 		this._haveGeneratedChildClusters = true;
 	},