diff --git a/ports/stm32/lwip_inc/lwipopts.h b/ports/stm32/lwip_inc/lwipopts.h
index 64ff104f71..8f54c83112 100644
--- a/ports/stm32/lwip_inc/lwipopts.h
+++ b/ports/stm32/lwip_inc/lwipopts.h
@@ -3,6 +3,11 @@
 
 #include <stdint.h>
 
+// This protection is not needed, instead we execute all lwIP code at PendSV priority
+#define SYS_ARCH_DECL_PROTECT(lev) do { } while (0)
+#define SYS_ARCH_PROTECT(lev) do { } while (0)
+#define SYS_ARCH_UNPROTECT(lev) do { } while (0)
+
 #define NO_SYS                          1
 #define SYS_LIGHTWEIGHT_PROT            1
 #define MEM_ALIGNMENT                   4
@@ -20,10 +25,17 @@
 #define LWIP_IPV6                       0
 #define LWIP_DHCP                       1
 #define LWIP_DHCP_CHECK_LINK_UP         1
+#define DHCP_DOES_ARP_CHECK             0 // to speed DHCP up
 #define LWIP_DNS                        1
+#define LWIP_DNS_SUPPORT_MDNS_QUERIES   1
+#define LWIP_MDNS_RESPONDER             1
 #define LWIP_IGMP                       1
 
+#define LWIP_NUM_NETIF_CLIENT_DATA      1 // mDNS responder requires 1
+#define MEMP_NUM_UDP_PCB                5 // mDNS responder requires 1
+
 #define SO_REUSE                        1
+#define TCP_LISTEN_BACKLOG              1
 
 extern uint32_t rng_get(void);
 #define LWIP_RAND() rng_get()