diff --git a/gyp/core.gypi b/gyp/core.gypi
index 5be1ead..b96a2ec 100644
--- a/gyp/core.gypi
+++ b/gyp/core.gypi
@@ -114,6 +114,7 @@
         '<(skia_src_path)/core/SkMaskGamma.h',
         '<(skia_src_path)/core/SkMath.cpp',
         '<(skia_src_path)/core/SkMatrix.cpp',
+        '<(skia_src_path)/core/SkMessageBus.h',
         '<(skia_src_path)/core/SkMetaData.cpp',
         '<(skia_src_path)/core/SkMipMap.cpp',
         '<(skia_src_path)/core/SkOnce.h',