diff --git a/tools/catalyst-auto b/tools/catalyst-auto
index fcb537d9..0e86be19 100755
--- a/tools/catalyst-auto
+++ b/tools/catalyst-auto
@@ -20,6 +20,7 @@ Usage:
 Options:
   -c|--config         Specifies the config file to use (required)
   --verbose           Send output of commands to console as well as log
+  -k|--keep-tmpdir    Don't remove temp dir when build finishes
   -h|--help           Show this message and quit
 
 EOH