diff --git a/src/api/sockets.c b/src/api/sockets.c
index 56d270a6..fb4aee17 100644
--- a/src/api/sockets.c
+++ b/src/api/sockets.c
@@ -689,7 +689,7 @@ lwip_select(int maxfdp1, fd_set *readset, fd_set *writeset, fd_set *exceptset,
     {
         if (timeout && timeout->tv_sec == 0 && timeout->tv_usec == 0)
         {
-            sys_sem_signal(socksem);
+            sys_sem_signal(selectsem);
             if (readset)
                 FD_ZERO(readset);
             if (writeset)