diff --git a/src/ol/renderer/webgl/TileLayer.js b/src/ol/renderer/webgl/TileLayer.js
index cc6f9c3f88..5ad6d238e2 100644
--- a/src/ol/renderer/webgl/TileLayer.js
+++ b/src/ol/renderer/webgl/TileLayer.js
@@ -503,7 +503,7 @@ class WebGLTileLayerRenderer extends WebGLLayerRenderer {
      * @param {import("../../PluggableMap.js").FrameState} frameState Frame state.
      */
     const postRenderFunction = function (map, frameState) {
-      tileSource.expireCache(tileSource.getProjection(), empty);
+      tileSource.expireCache(frameState.viewState.projection, empty);
     };
 
     frameState.postRenderFunctions.push(postRenderFunction);