diff --git a/src/ol/renderer/canvas/layer.js b/src/ol/renderer/canvas/layer.js
index 6bf1d0f738..296f4d8fe4 100644
--- a/src/ol/renderer/canvas/layer.js
+++ b/src/ol/renderer/canvas/layer.js
@@ -78,7 +78,7 @@ ol.renderer.canvas.Layer.prototype.composeFrame = function(frameState, layerStat
     var extent = layerState.extent;
     var clipped = extent !== undefined;
     if (clipped) {
-      this.clip(context, frameState, extent);
+      this.clip(context, frameState, /** @type {ol.Extent} */ (extent));
     }
 
     var imageTransform = this.getImageTransform();
diff --git a/src/ol/renderer/canvas/vectorlayer.js b/src/ol/renderer/canvas/vectorlayer.js
index fc1ef29379..0525478346 100644
--- a/src/ol/renderer/canvas/vectorlayer.js
+++ b/src/ol/renderer/canvas/vectorlayer.js
@@ -89,7 +89,7 @@ ol.renderer.canvas.VectorLayer.prototype.composeFrame = function(frameState, lay
   var clipExtent = layerState.extent;
   var clipped = clipExtent !== undefined;
   if (clipped) {
-    this.clip(context, frameState, clipExtent);
+    this.clip(context, frameState,  /** @type {ol.Extent} */ (clipExtent));
   }
   var replayGroup = this.replayGroup_;
   if (replayGroup && !replayGroup.isEmpty()) {
diff --git a/src/ol/renderer/canvas/vectortilelayer.js b/src/ol/renderer/canvas/vectortilelayer.js
index 143f98a1af..bd86581aec 100644
--- a/src/ol/renderer/canvas/vectortilelayer.js
+++ b/src/ol/renderer/canvas/vectortilelayer.js
@@ -77,7 +77,7 @@ ol.renderer.canvas.VectorTileLayer.prototype.composeFrame = function(
   var extent = layerState.extent;
   var clipped = extent !== undefined;
   if (clipped) {
-    this.clip(context, frameState, extent);
+    this.clip(context, frameState,  /** @type {ol.Extent} */ (extent));
   }
 
   var renderMode = this.getLayer().getRenderMode();