diff --git a/tools/package/bin/psemek-package-linux b/tools/package/bin/psemek-package-linux
index f34003cb..aa766bbd 100755
--- a/tools/package/bin/psemek-package-linux
+++ b/tools/package/bin/psemek-package-linux
@@ -1,5 +1,10 @@
 #!/usr/bin/env bash
 
+if [ "$#" -ne 1 ]; then
+    echo "Usage: psemek-package-linux <project-dir>"
+    exit 0
+fi
+
 PROJECT_DIR=`realpath "${1}"`
 
 docker run -u 1000 -v "${PROJECT_DIR}":/home/work-source psemek:package-linux /home/package.sh