diff --git a/snmp_standard/mode/diskusage.pm b/snmp_standard/mode/diskusage.pm
index ca11b4439..cdc9fa6a3 100644
--- a/snmp_standard/mode/diskusage.pm
+++ b/snmp_standard/mode/diskusage.pm
@@ -302,7 +302,7 @@ Allows to use regexp non case-sensitive (with --regexp).
 
 =item B<--reload-cache-time>
 
-Time in seconds before reloading cache file (default: 180).
+Time in minutes before reloading cache file (default: 180).
 
 =item B<--display-transform-src>