diff --git a/package/libgluonutil/src/libgluonutil.h b/package/libgluonutil/src/libgluonutil.h
index 39b253baa4348b8d73a284dac098895a670c9b7e..a2fe07446796365e85ed5f2872f59723ddb4b73b 100644
--- a/package/libgluonutil/src/libgluonutil.h
+++ b/package/libgluonutil/src/libgluonutil.h
@@ -42,6 +42,7 @@ struct json_object * gluonutil_wrap_and_free_string(char *str);
 
 bool gluonutil_has_domains(void);
 char * gluonutil_get_domain(void);
+char * gluonutil_get_primary_domain(void);
 struct json_object * gluonutil_load_site_config(void);
 
 #endif /* _LIBGLUON_LIBGLUON_H_ */