diff --git a/kuser/heimtools-commands.in b/kuser/heimtools-commands.in
index b22a8c58d..cf3bf2fd7 100644
--- a/kuser/heimtools-commands.in
+++ b/kuser/heimtools-commands.in
@@ -238,6 +238,7 @@ command = {
 	min_args = "1"
 	max_args = "2"
 	help = "Copies credential caches"
+        argument = "[source] destination"
 }
 command = {
 	name = "help"