diff --git a/Ethernet/socket.c b/Ethernet/socket.c
index 4f6ee50..778dba1 100644
--- a/Ethernet/socket.c
+++ b/Ethernet/socket.c
@@ -684,12 +684,12 @@ int32_t recv(uint8_t sn, uint8_t * buf, uint16_t len) { //lihan
                 return SOCK_BUSY;
             }
 #else
-            if (sock_io_mode & (1 << sn)) {
-                return SOCK_BUSY;
-            }
             if (recvsize != 0) {
                 break;
             }
+            if (sock_io_mode & (1 << sn)) {
+                return SOCK_BUSY;
+            }
 #endif
         };
 #if _WIZCHIP_ == 5300