diff --git a/src/core/renderers/webgl/managers/FilterManager.js b/src/core/renderers/webgl/managers/FilterManager.js
index eeb1a6a..2d5d5e9 100644
--- a/src/core/renderers/webgl/managers/FilterManager.js
+++ b/src/core/renderers/webgl/managers/FilterManager.js
@@ -563,8 +563,8 @@
             || minHeight !== this._screenHeight)
         {
             // TODO you could return a bigger texture if there is not one in the pool?
-            minWidth = bitTwiddle.nextPow2(minWidth * resolution);
-            minHeight = bitTwiddle.nextPow2(minHeight * resolution);
+            minWidth = bitTwiddle.nextPow2(minWidth);
+            minHeight = bitTwiddle.nextPow2(minHeight);
             key = ((minWidth & 0xFFFF) << 16) | (minHeight & 0xFFFF);
         }