diff --git a/include/nuttx/net/usrsock.h b/include/nuttx/net/usrsock.h
index a2ef6fb0f9..581e4b0342 100644
--- a/include/nuttx/net/usrsock.h
+++ b/include/nuttx/net/usrsock.h
@@ -154,8 +154,8 @@ begin_packed_struct struct usrsock_request_sendto_s
 
   int16_t usockid;
   int32_t flags;
+  uint32_t buflen;
   uint16_t addrlen;
-  uint16_t buflen;
 } end_packed_struct;
 
 begin_packed_struct struct usrsock_request_recvfrom_s
@@ -164,7 +164,7 @@ begin_packed_struct struct usrsock_request_recvfrom_s
 
   int16_t usockid;
   int32_t flags;
-  uint16_t max_buflen;
+  uint32_t max_buflen;
   uint16_t max_addrlen;
 } end_packed_struct;
 
diff --git a/net/usrsock/usrsock_recvmsg.c b/net/usrsock/usrsock_recvmsg.c
index a5aebfe2eb..d865742807 100644
--- a/net/usrsock/usrsock_recvmsg.c
+++ b/net/usrsock/usrsock_recvmsg.c
@@ -159,9 +159,9 @@ static int do_recvfrom_request(FAR struct usrsock_conn_s *conn,
       addrlen = UINT16_MAX;
     }
 
-  if (buflen > UINT16_MAX)
+  if (buflen > UINT32_MAX)
     {
-      buflen = UINT16_MAX;
+      buflen = UINT32_MAX;
     }
 
   /* Prepare request for daemon to read. */
diff --git a/net/usrsock/usrsock_sendmsg.c b/net/usrsock/usrsock_sendmsg.c
index b3fc97538e..8d9245a160 100644
--- a/net/usrsock/usrsock_sendmsg.c
+++ b/net/usrsock/usrsock_sendmsg.c
@@ -159,9 +159,9 @@ static int do_sendto_request(FAR struct usrsock_conn_s *conn,
       req.buflen += msg->msg_iov[i].iov_len;
     }
 
-  if (req.buflen > UINT16_MAX)
+  if (req.buflen > UINT32_MAX)
     {
-      req.buflen = UINT16_MAX;
+      req.buflen = UINT32_MAX;
     }
 
   bufs[0].iov_base = (FAR void *)&req;