diff --git a/src/ol/PluggableMap.js b/src/ol/PluggableMap.js
index 3df2448e4e..235a93b49f 100644
--- a/src/ol/PluggableMap.js
+++ b/src/ol/PluggableMap.js
@@ -1239,11 +1239,11 @@ class PluggableMap extends BaseObject {
         this.handleResize_ = this.updateSize.bind(this);
         window.addEventListener(EventType.RESIZE, this.handleResize_, false);
       }
-	  
-	  if (this.getViewport().getRootNode().defaultView != window ){
-		window.removeEventListener(EventType.RESIZE, this.handleResize_);  	    
-	    this.getViewport().getRootNode().defaultView.addEventListener(EventType.RESIZE, this.handleResize_, false);	
-	  }
+      
+      if (this.getViewport().getRootNode().defaultView != window ){
+        window.removeEventListener(EventType.RESIZE, this.handleResize_);
+        this.getViewport().getRootNode().defaultView.addEventListener(EventType.RESIZE, this.handleResize_, false);
+      }
     }
 
     this.updateSize();