diff --git a/src/core/renderers/webgl/managers/MaskManager.js b/src/core/renderers/webgl/managers/MaskManager.js
index e28fa6b..6d00bc1 100644
--- a/src/core/renderers/webgl/managers/MaskManager.js
+++ b/src/core/renderers/webgl/managers/MaskManager.js
@@ -105,6 +105,7 @@
         alphaMaskFilter = this.alphaMaskPool[this.alphaMaskIndex] = [new AlphaMaskFilter(maskData)];
     }
 
+    alphaMaskFilter[0].resolution = this.renderer.resolution;
     alphaMaskFilter[0].maskSprite = maskData;
 
     //TODO - may cause issues!