diff --git a/qemu-monitor.hx b/qemu-monitor.hx
index bf47ae052..220ed9c97 100644
--- a/qemu-monitor.hx
+++ b/qemu-monitor.hx
@@ -611,6 +611,8 @@ ETEXI
     },
 
 STEXI
+@item cpu @var{index}
+@findex cpu
 Set the default CPU.
 ETEXI