diff --git a/argument.cpp b/argument.cpp
index 86cc31b..0d24112 100644
--- a/argument.cpp
+++ b/argument.cpp
@@ -32,7 +32,7 @@
 {
     int option = 0;
     while (-1 !=
-           (option = getopt_long(argc, argv, optionstr, options, nullptr)))
+           (option = getopt_long(argc, argv, optionstr, &options[0], nullptr)))
     {
         if ((option == '?') || (option == 'h'))
         {