[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= \
diff --git a/src/hb-aat.h b/src/hb-aat.h
index 6bba931..c14313d 100644
--- a/src/hb-aat.h
+++ b/src/hb-aat.h
@@ -26,6 +26,8 @@
#define HB_AAT_H
#define HB_AAT_H_IN
+#include "hb.h"
+
#include "hb-aat-layout.h"
HB_BEGIN_DECLS