Prefer C linkage
diff --git a/src/hb-glib.h b/src/hb-glib.h
index 76f7676..81ab15d 100644
--- a/src/hb-glib.h
+++ b/src/hb-glib.h
@@ -31,9 +31,11 @@
 
 HB_BEGIN_DECLS
 
+
 hb_unicode_funcs_t *
 hb_glib_get_unicode_funcs (void);
 
+
 HB_END_DECLS
 
 #endif /* HB_GLIB_H */