diff --git a/gfx/layers/TiledLayerBuffer.h b/gfx/layers/TiledLayerBuffer.h
index 687c58d6bb1..e6fe6ea0775 100644
--- a/gfx/layers/TiledLayerBuffer.h
+++ b/gfx/layers/TiledLayerBuffer.h
@@ -225,7 +225,6 @@ TiledLayerBuffer<Derived, Tile>::GetTile(const nsIntPoint& aTileOrigin) const
   // TODO Cache firstTileOriginX/firstTileOriginY
   // Find the tile x/y of the first tile and the target tile relative to the (0, 0)
   // origin, the difference is the tile x/y relative to the start of the tile buffer.
-  volatile float resolution = mResolution; // bug 881018 investigation
   int firstTileX = floor_div(mValidRegion.GetBounds().x, GetScaledTileLength());
   int firstTileY = floor_div(mValidRegion.GetBounds().y, GetScaledTileLength());
   return GetTile(floor_div(aTileOrigin.x, GetScaledTileLength()) - firstTileX,
diff --git a/gfx/layers/composite/TiledContentHost.cpp b/gfx/layers/composite/TiledContentHost.cpp
index 6ad99772e10..8b23c91b7e5 100644
--- a/gfx/layers/composite/TiledContentHost.cpp
+++ b/gfx/layers/composite/TiledContentHost.cpp
@@ -228,7 +228,7 @@ TiledContentHost::RenderLayerBuffer(TiledLayerBufferComposite& aLayerBuffer,
     NS_WARNING("Can't render tiled content host - no compositor");
     return;
   }
-  volatile float resolution = aLayerBuffer.GetResolution(); // bug 881018 investigation
+  float resolution = aLayerBuffer.GetResolution();
   gfxSize layerScale(1, 1);
   // We assume that the current frame resolution is the one used in our primary
   // layer buffer. Compensate for a changing frame resolution.