Prefer C linkage
diff --git a/src/hb-buffer.h b/src/hb-buffer.h
index 7b8b7ea..e6d477d 100644
--- a/src/hb-buffer.h
+++ b/src/hb-buffer.h
@@ -34,6 +34,7 @@
 
 HB_BEGIN_DECLS
 
+
 typedef struct _hb_buffer_t hb_buffer_t;
 
 typedef struct _hb_glyph_info_t {