diff --git a/gn/effects.gni b/gn/effects.gni
index d79481f..3ae4ebe 100644
--- a/gn/effects.gni
+++ b/gn/effects.gni
@@ -40,6 +40,7 @@
   "$_src/effects/SkEmbossMaskFilter.cpp",
   "$_src/effects/SkImageSource.cpp",
   "$_src/effects/SkGaussianEdgeShader.cpp",
+  "$_src/effects/SkHighContrastFilter.cpp",
   "$_src/effects/SkLayerDrawLooper.cpp",
   "$_src/effects/SkLayerRasterizer.cpp",
   "$_src/effects/SkLightingImageFilter.cpp",