diff --git a/hmp.c b/hmp.c
index 79f9c7d..468f97d 100644
--- a/hmp.c
+++ b/hmp.c
@@ -1092,11 +1092,11 @@
     hmp_handle_error(mon, &err);
 }
 
-static void hmp_change_read_arg(Monitor *mon, const char *password,
-                                void *opaque)
+static void hmp_change_read_arg(void *opaque, const char *password,
+                                void *readline_opaque)
 {
     qmp_change_vnc_password(password, NULL);
-    monitor_read_command(mon, 1);
+    monitor_read_command(opaque, 1);
 }
 
 void hmp_change(Monitor *mon, const QDict *qdict)