diff --git a/video/adaptation/BUILD.gn b/video/adaptation/BUILD.gn
index 20a2370..11962c0 100644
--- a/video/adaptation/BUILD.gn
+++ b/video/adaptation/BUILD.gn
@@ -12,6 +12,8 @@
   sources = [
     "balanced_constraint.cc",
     "balanced_constraint.h",
+    "bandwidth_quality_scaler_resource.cc",
+    "bandwidth_quality_scaler_resource.h",
     "bitrate_constraint.cc",
     "bitrate_constraint.h",
     "encode_usage_resource.cc",