diff --git a/opengl/tests/lib/WindowSurface.cpp b/opengl/tests/lib/WindowSurface.cpp
index ff91260..1428945 100644
--- a/opengl/tests/lib/WindowSurface.cpp
+++ b/opengl/tests/lib/WindowSurface.cpp
@@ -56,7 +56,7 @@
 
     sp<SurfaceControl> sc = surfaceComposerClient->createSurface(
             String8("Benchmark"), width, height,
-            PIXEL_FORMAT_RGBA_8888, ISurfaceComposerClient::eOpaque);
+            PIXEL_FORMAT_RGBX_8888, ISurfaceComposerClient::eOpaque);
     if (sc == NULL || !sc->isValid()) {
         fprintf(stderr, "Failed to create SurfaceControl\n");
         return;