diff --git a/src/ol/renderer/webgl/webglmaprenderer.js b/src/ol/renderer/webgl/webglmaprenderer.js
index 32579a1bcd..25acd5e3a7 100644
--- a/src/ol/renderer/webgl/webglmaprenderer.js
+++ b/src/ol/renderer/webgl/webglmaprenderer.js
@@ -365,7 +365,7 @@ ol.renderer.webgl.Map.prototype.expireCache_ = function(map, frameState) {
     textureCacheEntry = /** @type {?ol.renderer.webgl.TextureCacheEntry} */
         (this.textureCache_.peekLast());
     if (goog.isNull(textureCacheEntry)) {
-      if (+this.textureCache_.peekLastKey() == frameState.time) {
+      if (+this.textureCache_.peekLastKey() == frameState.index) {
         break;
       } else {
         --this.textureCacheFrameMarkerCount_;
@@ -521,7 +521,7 @@ ol.renderer.webgl.Map.prototype.renderFrame = function(frameState) {
 
   this.focus_ = frameState.focus;
 
-  this.textureCache_.set(frameState.time.toString(), null);
+  this.textureCache_.set(frameState.index.toString(), null);
   ++this.textureCacheFrameMarkerCount_;
 
   goog.array.forEach(frameState.layersArray, function(layer) {