diff --git a/src/core/netif.c b/src/core/netif.c
index 819dab71..a417f0a4 100644
--- a/src/core/netif.c
+++ b/src/core/netif.c
@@ -583,7 +583,7 @@ netif_loop_output(struct netif *netif, struct pbuf *p,
 
 #if LWIP_NETIF_LOOPBACK_MULTITHREADING
   /* For multithreading environment, schedule a call to netif_poll */
-  tcpip_callback(netif_poll, netif);
+  tcpip_callback((void (*)(void *))(netif_poll), netif);
 #endif /* LWIP_NETIF_LOOPBACK_MULTITHREADING */
 
   return ERR_OK;