diff --git a/pms-cli b/pms-cli
index 1f19390..38725f5 100755
--- a/pms-cli
+++ b/pms-cli
@@ -81,4 +81,8 @@ if ! grep "$SUBCOMMAND" "$ROOTPATH/functions/$COMMAND" &> /dev/null; then
 fi
 
 source "$ROOTPATH/functions/$COMMAND"
+if [[ -z "$SUBCOMMAND" ]]; then
+  "${COMMAND}_help"
+  exit 1
+fi
 "${COMMAND}_${SUBCOMMAND}" ${PARAMS[@]}