diff --git a/gn/gm.gni b/gn/gm.gni
index 65c6766..67d2ced 100644
--- a/gn/gm.gni
+++ b/gn/gm.gni
@@ -188,6 +188,7 @@
   "$_gm/lightingshaderbevel.cpp",
   "$_gm/linepaths.cpp",
   "$_gm/localmatriximagefilter.cpp",
+  "$_gm/localmatriximageshader.cpp",
   "$_gm/lumafilter.cpp",
   "$_gm/manypaths.cpp",
   "$_gm/matrixconvolution.cpp",