diff --git a/gfx/gl/GLTextureImage.h b/gfx/gl/GLTextureImage.h
index b5e6822e089..1ab2708ba84 100644
--- a/gfx/gl/GLTextureImage.h
+++ b/gfx/gl/GLTextureImage.h
@@ -329,7 +329,6 @@ protected:
     void* mIterationCallbackData;
     nsTArray< nsRefPtr<TextureImage> > mImages;
     bool mInUpdate;
-    gfx::IntSize mSize;
     unsigned int mTileSize;
     unsigned int mRows, mColumns;
     GLContext* mGL;