--- a/gfx/2d/DrawTargetSkia.cpp
+++ b/gfx/2d/DrawTargetSkia.cpp
@@ -11,16 +11,17 @@
 #include "HelpersSkia.h"
 
 #include "mozilla/ArrayUtils.h"
 
 #include "skia/include/core/SkSurface.h"
 #include "skia/include/core/SkTypeface.h"
 #include "skia/include/effects/SkGradientShader.h"
 #include "skia/include/core/SkColorFilter.h"
+#include "skia/include/core/SkRegion.h"
 #include "skia/include/effects/SkBlurImageFilter.h"
 #include "skia/include/effects/SkLayerRasterizer.h"
 #include "skia/src/core/SkDevice.h"
 #include "Blur.h"
 #include "Logging.h"
 #include "Tools.h"
 #include "DataSurfaceHelpers.h"
 #include "PathHelpers.h"