diff --git a/usr.sbin/mergemaster/mergemaster.8 b/usr.sbin/mergemaster/mergemaster.8
index 54e6be77df68..63cf2ab1ee88 100644
--- a/usr.sbin/mergemaster/mergemaster.8
+++ b/usr.sbin/mergemaster/mergemaster.8
@@ -32,7 +32,7 @@
 .Nd merge configuration files, et al during an upgrade
 .Sh SYNOPSIS
 .Nm
-.Op Fl scrvahipCP
+.Op Fl scrvahipCPU
 .Op Fl m Ar /path/to/sources
 .Op Fl t Ar /path/to/temp/root
 .Op Fl d