diff --git a/plugins/python/pump_subhandler.c b/plugins/python/pump_subhandler.c
index 80af56c8..36c2cf87 100644
--- a/plugins/python/pump_subhandler.c
+++ b/plugins/python/pump_subhandler.c
@@ -107,7 +107,7 @@ void *uwsgi_request_subhandler_pump(struct wsgi_request *wsgi_req, struct uwsgi_
         // if async_post is mapped as a file, directly use it as wsgi.input
         if (wsgi_req->async_post) {
 #ifdef PYTHREE
-                wsgi_req->async_input = PyFile_FromFd(fileno(wsgi_req->async_post), "pump_body", "rb", 0, NULL, NULL, NULL, 0);
+                wsgi_req->async_input = PyFile_FromFd(fileno((FILE *)wsgi_req->async_post), "pump_body", "rb", 0, NULL, NULL, NULL, 0);
 #else
                 wsgi_req->async_input = PyFile_FromFile(wsgi_req->async_post, "pump_body", "r", NULL);
 #endif
diff --git a/plugins/python/web3_subhandler.c b/plugins/python/web3_subhandler.c
index 4911a46e..705a249a 100644
--- a/plugins/python/web3_subhandler.c
+++ b/plugins/python/web3_subhandler.c
@@ -47,7 +47,7 @@ void *uwsgi_request_subhandler_web3(struct wsgi_request *wsgi_req, struct uwsgi_
         // if async_post is mapped as a file, directly use it as wsgi.input
         if (wsgi_req->async_post) {
 #ifdef PYTHREE
-                wsgi_req->async_input = PyFile_FromFd(fileno(wsgi_req->async_post), "web3_input", "rb", 0, NULL, NULL, NULL, 0);
+                wsgi_req->async_input = PyFile_FromFd(fileno((FILE *)wsgi_req->async_post), "web3_input", "rb", 0, NULL, NULL, NULL, 0);
 #else
                 wsgi_req->async_input = PyFile_FromFile(wsgi_req->async_post, "web3_input", "r", NULL);
 #endif