diff --git a/src/command/cmd_defs.c b/src/command/cmd_defs.c
index 04f67968..456366c2 100644
--- a/src/command/cmd_defs.c
+++ b/src/command/cmd_defs.c
@@ -897,7 +897,7 @@ static struct cmd_t command_defs[] = {
               "Enable/disable sending last activity, and send last activity requests.")
       CMD_ARGS(
               { "on|off", "Enable or disable sending of last activity." },
-              { "<jid>", "The JID of the entity to query, omitting the JID will query your server." })
+              { "<jid>", "The JID of the entity to query. Omitting the JID will query your server for its uptime." })
       CMD_EXAMPLES(
               "/lastactivity",
               "/lastactivity off",