diff --git a/src/ol/renderer/layerrenderer.js b/src/ol/renderer/layerrenderer.js
index 6d24a5a933..61a7f42711 100644
--- a/src/ol/renderer/layerrenderer.js
+++ b/src/ol/renderer/layerrenderer.js
@@ -182,7 +182,7 @@ ol.renderer.Layer.prototype.renderIfReadyAndVisible = function() {
 ol.renderer.Layer.prototype.scheduleExpireCache = function(frameState, tileSource) {
   if (tileSource.canExpireCache()) {
     frameState.postRenderFunctions.push(
-        goog.partial(
+        /** @type {ol.PostRenderFunction} */ (goog.partial(
             /**
              * @param {ol.source.Tile} tileSource Tile source.
              * @param {ol.Map} map Map.
@@ -192,7 +192,7 @@ ol.renderer.Layer.prototype.scheduleExpireCache = function(frameState, tileSourc
               var tileSourceKey = goog.getUid(tileSource).toString();
               tileSource.expireCache(frameState.viewState.projection,
                                      frameState.usedTiles[tileSourceKey]);
-            }, tileSource));
+            }, tileSource)));
   }
 };
 
diff --git a/src/ol/renderer/maprenderer.js b/src/ol/renderer/maprenderer.js
index a716b2166c..6414b9b791 100644
--- a/src/ol/renderer/maprenderer.js
+++ b/src/ol/renderer/maprenderer.js
@@ -351,7 +351,9 @@ ol.renderer.Map.prototype.removeUnusedLayerRenderers_ = function(map, frameState
  * @protected
  */
 ol.renderer.Map.prototype.scheduleExpireIconCache = function(frameState) {
-  frameState.postRenderFunctions.push(ol.renderer.Map.expireIconCache_);
+  frameState.postRenderFunctions.push(
+    /** @type {ol.PostRenderFunction} */ (ol.renderer.Map.expireIconCache_)
+  );
 };
 
 
@@ -364,7 +366,8 @@ ol.renderer.Map.prototype.scheduleRemoveUnusedLayerRenderers = function(frameSta
   for (layerKey in this.layerRenderers_) {
     if (!(layerKey in frameState.layerStates)) {
       frameState.postRenderFunctions.push(
-          this.removeUnusedLayerRenderers_.bind(this));
+        /** @type {ol.PostRenderFunction} */ (this.removeUnusedLayerRenderers_.bind(this))
+      );
       return;
     }
   }
diff --git a/src/ol/renderer/webgl/webglimagelayerrenderer.js b/src/ol/renderer/webgl/webglimagelayerrenderer.js
index 2cb88aa377..43a6061a96 100644
--- a/src/ol/renderer/webgl/webglimagelayerrenderer.js
+++ b/src/ol/renderer/webgl/webglimagelayerrenderer.js
@@ -139,7 +139,7 @@ ol.renderer.webgl.ImageLayer.prototype.prepareFrame = function(frameState, layer
         texture = this.createTexture_(image_);
         if (this.texture) {
           frameState.postRenderFunctions.push(
-              goog.partial(
+              /** @type {ol.PostRenderFunction} */ (goog.partial(
                   /**
                    * @param {WebGLRenderingContext} gl GL.
                    * @param {WebGLTexture} texture Texture.
@@ -148,7 +148,7 @@ ol.renderer.webgl.ImageLayer.prototype.prepareFrame = function(frameState, layer
                     if (!gl.isContextLost()) {
                       gl.deleteTexture(texture);
                     }
-                  }, gl, this.texture));
+                  }, gl, this.texture)));
         }
       }
     }
diff --git a/src/ol/renderer/webgl/webgllayerrenderer.js b/src/ol/renderer/webgl/webgllayerrenderer.js
index dea5090c92..1207eebc56 100644
--- a/src/ol/renderer/webgl/webgllayerrenderer.js
+++ b/src/ol/renderer/webgl/webgllayerrenderer.js
@@ -95,7 +95,7 @@ ol.renderer.webgl.Layer.prototype.bindFramebuffer = function(frameState, framebu
       this.framebufferDimension != framebufferDimension) {
 
     frameState.postRenderFunctions.push(
-        goog.partial(
+        /** @type {ol.PostRenderFunction} */ (goog.partial(
             /**
              * @param {WebGLRenderingContext} gl GL.
              * @param {WebGLFramebuffer} framebuffer Framebuffer.
@@ -106,7 +106,7 @@ ol.renderer.webgl.Layer.prototype.bindFramebuffer = function(frameState, framebu
                 gl.deleteFramebuffer(framebuffer);
                 gl.deleteTexture(texture);
               }
-            }, gl, this.framebuffer, this.texture));
+            }, gl, this.framebuffer, this.texture)));
 
     var texture = ol.webgl.Context.createEmptyTexture(
         gl, framebufferDimension, framebufferDimension);
diff --git a/src/ol/renderer/webgl/webglmaprenderer.js b/src/ol/renderer/webgl/webglmaprenderer.js
index fed3f58ee8..ecdce69286 100644
--- a/src/ol/renderer/webgl/webglmaprenderer.js
+++ b/src/ol/renderer/webgl/webglmaprenderer.js
@@ -512,7 +512,9 @@ ol.renderer.webgl.Map.prototype.renderFrame = function(frameState) {
 
   if (this.textureCache_.getCount() - this.textureCacheFrameMarkerCount_ >
       ol.WEBGL_TEXTURE_CACHE_HIGH_WATER_MARK) {
-    frameState.postRenderFunctions.push(this.expireCache_.bind(this));
+    frameState.postRenderFunctions.push(
+      /** @type {ol.PostRenderFunction} */ (this.expireCache_.bind(this))
+    );
   }
 
   if (!this.tileTextureQueue_.isEmpty()) {