diff --git a/src/hb-common.h b/src/hb-common.h
index 7c7ad87c7..9721f3880 100644
--- a/src/hb-common.h
+++ b/src/hb-common.h
@@ -495,6 +495,8 @@ hb_language_matches (hb_language_t language,
  * @HB_SCRIPT_TOTO: `Toto`, Since: 3.0.0
  * @HB_SCRIPT_VITHKUQI: `Vith`, Since: 3.0.0
  * @HB_SCRIPT_MATH: `Zmth`, Since: 3.4.0
+ * @HB_SCRIPT_KAWI: `Kawi`, Since: REPLACEME
+ * @HB_SCRIPT_NAG_MUNDARI: `Nagm`, Since: REPLACEME
  * @HB_SCRIPT_INVALID: No script set
  *
  * Data type for scripts. Each #hb_script_t's value is an #hb_tag_t corresponding
@@ -716,6 +718,12 @@ typedef enum
    */
   HB_SCRIPT_MATH			= HB_TAG ('Z','m','t','h'),
 
+  /*
+   * Since REPLACEME
+   */
+  HB_SCRIPT_KAWI			= HB_TAG ('K','a','w','i'), /*15.0*/
+  HB_SCRIPT_NAG_MUNDARI			= HB_TAG ('N','a','g','m'), /*15.0*/
+
   /* No script set. */
   HB_SCRIPT_INVALID			= HB_TAG_NONE,