diff --git a/src/core/renderers/webgl/utils/RenderTarget.js b/src/core/renderers/webgl/utils/RenderTarget.js
index 6d2467f..4cf5b67 100644
--- a/src/core/renderers/webgl/utils/RenderTarget.js
+++ b/src/core/renderers/webgl/utils/RenderTarget.js
@@ -203,7 +203,7 @@
     setFrame(destinationFrame, sourceFrame)
     {
         this.destinationFrame = destinationFrame || this.destinationFrame || this.defaultFrame;
-        this.sourceFrame = sourceFrame || this.sourceFrame || destinationFrame;
+        this.sourceFrame = sourceFrame || this.sourceFrame || this.destinationFrame;
     }
 
     /**