diff --git a/src/Makefile.sources b/src/Makefile.sources
index 14c97996b..d8b7b2f7d 100644
--- a/src/Makefile.sources
+++ b/src/Makefile.sources
@@ -256,6 +256,7 @@ HB_SUBSET_sources = \
 	hb-number.hh \
 	hb-ot-cff1-table.cc \
 	hb-ot-cff2-table.cc \
+	hb-ot-color-colrv1-closure.hh \
 	hb-static.cc \
 	hb-subset-cff-common.cc \
 	hb-subset-cff-common.hh \