diff --git a/euphoria-install.sh b/euphoria-install.sh
index 45b882a..03b7c50 100755
--- a/euphoria-install.sh
+++ b/euphoria-install.sh
@@ -109,4 +109,17 @@ case $1 in
     check_root
     uninstall_pkg
   ;;
+
+  *)
+    printf """
+    [SYNOPSIS]
+    ${0} <option>
+
+    [OPTIONS]
+
+    install      Install ${name}-${version}
+    uninstall    Uninstall ${name}-${version}
+
+    """
+  ;;
 esac