diff --git a/gmslides.gypi b/gmslides.gypi
index 17a41c8..a0d418b 100644
--- a/gmslides.gypi
+++ b/gmslides.gypi
@@ -8,6 +8,7 @@
     '../gm/bitmapcopy.cpp',
     '../gm/bitmapmatrix.cpp',
     '../gm/bitmapfilters.cpp',
+    '../gm/bitmaprect.cpp',
     '../gm/bitmapscroll.cpp',
     '../gm/blend.cpp',
     '../gm/blurs.cpp',