diff --git a/hmp.h b/hmp.h
index 29dbf93..621bdc2 100644
--- a/hmp.h
+++ b/hmp.h
@@ -52,5 +52,6 @@
 void hmp_set_password(Monitor *mon, const QDict *qdict);
 void hmp_expire_password(Monitor *mon, const QDict *qdict);
 void hmp_eject(Monitor *mon, const QDict *qdict);
+void hmp_change(Monitor *mon, const QDict *qdict);
 
 #endif