diff --git a/src/rpc/virnetsocket.c b/src/rpc/virnetsocket.c
index c4fd9ee98157369cd8819d8e3252c8664bdb81b1..14c4a4f907de1c5282a333f9afa1c502cb2a2c72 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) {