diff --git a/core.gyp b/core.gyp
index 2639ff4..3034264 100644
--- a/core.gyp
+++ b/core.gyp
@@ -22,6 +22,7 @@
         '../include/utils',
         '../include/xml',
         '../src/core',
+        '../src/opts',
         '../src/image',
       ],
       'sources': [
diff --git a/opts.gyp b/opts.gyp
index 04966ba..d9cd6f2 100644
--- a/opts.gyp
+++ b/opts.gyp
@@ -173,6 +173,7 @@
         '../src/opts/SkBitmapProcState_matrix_clamp_neon.h',
         '../src/opts/SkBitmapProcState_matrix_repeat_neon.h',
         '../src/opts/SkBlitRow_opts_arm_neon.cpp',
+        '../src/opts/SkXfermode_opts_arm_neon.cpp',
       ],
     },
   ],