diff --git a/src/nxt_python_wsgi.c b/src/nxt_python_wsgi.c
index 7c4a94f1..a4b5a1f5 100644
--- a/src/nxt_python_wsgi.c
+++ b/src/nxt_python_wsgi.c
@@ -383,6 +383,8 @@ nxt_python_request_handler(nxt_unit_request_info_t *req)
 
     args = PyTuple_New(2);
     if (nxt_slow_path(args == NULL)) {
+        Py_DECREF(environ);
+
         nxt_unit_req_error(req, "Python failed to create arguments tuple");
 
         rc = NXT_UNIT_ERROR;