--- a/gfx/layers/ThebesLayerBuffer.cpp
+++ b/gfx/layers/ThebesLayerBuffer.cpp
@@ -594,17 +594,17 @@ ThebesLayerBuffer::BeginPaint(ThebesLaye
       // pixels are sampled
       neededRegion = destBufferRect;
     }
 
     // If we have an existing buffer, but the content type has changed or we
     // have transitioned into/out of component alpha, then we need to recreate it.
     if (HaveBuffer() &&
         (contentType != BufferContentType() ||
-         mode == Layer::SURFACE_COMPONENT_ALPHA) != (HaveBufferOnWhite())) {
+        (mode == Layer::SURFACE_COMPONENT_ALPHA) != HaveBufferOnWhite())) {
 
       // We're effectively clearing the valid region, so we need to draw
       // the entire needed region now.
       result.mRegionToInvalidate = aLayer->GetValidRegion();
       validRegion.SetEmpty();
       Clear();
       // Restart decision process with the cleared buffer. We can only go
       // around the loop one more iteration, since mBuffer is null now.