diff --git a/hmp.h b/hmp.h
index e4227d3..2b0c1e4 100644
--- a/hmp.h
+++ b/hmp.h
@@ -46,5 +46,6 @@
 void hmp_balloon(Monitor *mon, const QDict *qdict);
 void hmp_block_resize(Monitor *mon, const QDict *qdict);
 void hmp_snapshot_blkdev(Monitor *mon, const QDict *qdict);
+void hmp_migrate_cancel(Monitor *mon, const QDict *qdict);
 
 #endif