diff --git a/src/Makefile.am b/src/Makefile.am
index acedaa0..ba07ac5 100644
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -91,6 +91,7 @@
 	hb-ot-shape-complex-arabic.cc \
 	hb-ot-shape-complex-arabic-fallback.hh \
 	hb-ot-shape-complex-arabic-table.hh \
+	hb-ot-shape-complex-arabic-win1256.hh \
 	hb-ot-shape-complex-default.cc \
 	hb-ot-shape-complex-hangul.cc \
 	hb-ot-shape-complex-hebrew.cc \