diff --git a/gn/sksl.gni b/gn/sksl.gni
index aa80bd7..6c0454a 100644
--- a/gn/sksl.gni
+++ b/gn/sksl.gni
@@ -88,6 +88,7 @@
   "$_src/gpu/effects/GrConfigConversionEffect.fp",
   "$_src/gpu/effects/GrConstColorProcessor.fp",
   "$_src/gpu/effects/GrDeviceSpaceEffect.fp",
+  "$_src/gpu/effects/GrDitherEffect.fp",
   "$_src/gpu/effects/GrEllipseEffect.fp",
   "$_src/gpu/effects/GrHSLToRGBFilterEffect.fp",
   "$_src/gpu/effects/GrLumaColorFilterEffect.fp",