diff --git a/gtm b/gtm
index 0dafc74..007e933 100755
--- a/gtm
+++ b/gtm
@@ -369,12 +369,11 @@ def show_help():
     parser.print_help()
 
 if __name__ == "__main__":
-    parser = argparse.ArgumentParser(add_help=False, description="A \"Git Time Machine\" for viewing file history")
-    parser.add_argument("-d, --diff", action="store_true", help="Highlight newly added and deleted lines")
+    parser = argparse.ArgumentParser(description="A \"Git Time Machine\" for viewing file history")
+    parser.add_argument("-d", "--diff", action="store_true", help="Highlight newly added and deleted lines")
     parser.add_argument("--diff-additions", action="store_true", help="Highlight newly added lines in green")
     parser.add_argument("--diff-deletions", action="store_true", help="Show deleted lines in red")
     parser.add_argument("-v", "--version", action="store_true", help="Show version number")
-    parser.add_argument("-h", "--help", action="store_true", help="Show help information")
     parser.add_argument("filename", nargs="?", help="File to view history for")
     
     args = parser.parse_args()
@@ -382,9 +381,9 @@ if __name__ == "__main__":
     if args.version:
         print(f"gtm version {VERSION}")
         sys.exit(0)
-    elif args.help or not args.filename:
-        show_help()
-        sys.exit(0 if args.help else 1)
+    elif not args.filename:
+        parser.print_help()
+        sys.exit(1)
     
     filename = args.filename