improve usage message

1 files changed, 1 insertions, 1 deletions

diff --git a/etckeeper b/etckeeper
index 5606b72..e5be32f 100755
--- a/etckeeper
+++ b/etckeeper
@@ -2,7 +2,7 @@
 set -e
 
 if [ -z "$1" ]; then
-	echo "usage: etckeeper command" >&2
+	echo "usage: etckeeper command [directory]" >&2
 	exit 1
 fi
 command="$1"