diff --git a/src/rpc/virnetsocket.c b/src/rpc/virnetsocket.c
index e950d7fd77f56973baab9766dcdfc2a6b5280c58..dcf98b1e933c18f2673c83a6ca0fbea05c24d223 100644
--- a/src/rpc/virnetsocket.c
+++ b/src/rpc/virnetsocket.c
@@ -1055,7 +1055,7 @@ int virNetSocketDupFD(virNetSocketPtr sock, bool cloexec)
     int fd;
 
     if (cloexec)
-        fd = fcntl(sock->fd, F_DUPFD_CLOEXEC);
+        fd = fcntl(sock->fd, F_DUPFD_CLOEXEC, 0);
     else
         fd = dup(sock->fd);
     if (fd < 0) {