[aat] Fix include issues
diff --git a/src/Makefile.am b/src/Makefile.am
index b3cc42f..c726cf2 100644
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -424,6 +424,8 @@
 	-DHB_H_IN \
 	-DHB_OT_H \
 	-DHB_OT_H_IN \
+	-DHB_AAT_H \
+	-DHB_AAT_H_IN \
 	-DHB_GOBJECT_H \
 	-DHB_GOBJECT_H_IN \
 	-DHB_EXTERN= \