diff --git a/tools/command-lines.in b/tools/command-lines.in
index 840d771df..e5171d3f0 100644
--- a/tools/command-lines.in
+++ b/tools/command-lines.in
@@ -1473,9 +1473,10 @@ ID: pvscan_display
 DESC: Display PV information.
 
 pvscan --cache_long
-OO: --ignorelockingfailure, --reportformat ReportFmt, --background,
+OO: --ignorelockingfailure, --reportformat ReportFmt,
 --activate ay, --major Number, --minor Number
 OP: PV|String ...
+IO: --background
 ID: pvscan_cache
 DESC: Autoactivate a VG when all PVs are online.