diff --git a/src/sfnt/rules.mk b/src/sfnt/rules.mk
index a77b8ddd1..09802a576 100644
--- a/src/sfnt/rules.mk
+++ b/src/sfnt/rules.mk
@@ -41,7 +41,8 @@ SFNT_DRV_SRC := $(SFNT_DIR)/pngshim.c  \
                 $(SFNT_DIR)/ttload.c   \
                 $(SFNT_DIR)/ttmtx.c    \
                 $(SFNT_DIR)/ttpost.c   \
-                $(SFNT_DIR)/ttsbit.c
+                $(SFNT_DIR)/ttsbit.c   \
+                $(SFNT_DIR)/woff2tags.c
 
 # SFNT driver headers
 #
diff --git a/src/sfnt/sfnt.c b/src/sfnt/sfnt.c
index 9fed618a6..51d63d2df 100644
--- a/src/sfnt/sfnt.c
+++ b/src/sfnt/sfnt.c
@@ -34,6 +34,7 @@
 #include "ttmtx.c"
 #include "ttpost.c"
 #include "ttsbit.c"
+#include "woff2tags.c"
 
 
 /* END */