diff --git a/monitarr/monitarr/main.cpp b/monitarr/monitarr/main.cpp
index 88b8d96..e5a06ca 100644
--- a/monitarr/monitarr/main.cpp
+++ b/monitarr/monitarr/main.cpp
@@ -72,12 +72,22 @@ auto main(int argc, char **argv) -> int {
       ret = config_cmd(cfg);
     } else if (argc == 1 || has_arg("-h", argc, argv)) {
       ret = usage_cmd();
+      if (ret == 0 && argc == 1) {
+        utils::error::handle_error(function_name, "no arguments specified");
+        ret = 1;
+      }
     } else if (has_arg("-l", argc, argv)) {
       ret = list_cmd(argc, argv, cfg);
     } else if (has_arg("-r", argc, argv)) {
       ret = run_cmd(cfg, cfg_file);
     } else if (has_arg("-s", argc, argv)) {
       ret = show_cmd(argc, argv, cfg);
+    } else {
+      utils::error::handle_error(function_name, "invalid argument specified");
+      ret = usage_cmd();
+      if (ret == 0) {
+        ret = 1;
+      }
     }
   } catch (const std::exception &ex) {
     utils::error::handle_exception(function_name, ex);