diff --git a/src/Makefile.am b/src/Makefile.am
index b3cc42f3f..c726cf2a6 100644
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -424,6 +424,8 @@ HarfBuzz_0_0_gir_CFLAGS = \
 	-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 6bba931fa..c14313d1e 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