diff --git a/scripts/openapi-http-server.py b/scripts/openapi-http-server.py
index 307e7dbe..1865e6c8 100755
--- a/scripts/openapi-http-server.py
+++ b/scripts/openapi-http-server.py
@@ -47,7 +47,7 @@ if __name__ == '__main__':
     )
     args = parser.parse_args()
 
-    os.chdir(args.openapi)
+    os.chdir(args.openapi_dir)
 
     httpd = socketserver.TCPServer(("localhost", args.port),
                                    MyHTTPRequestHandler)