diff --git a/src/core/init.c b/src/core/init.c
index 0cc90a88..d9170216 100644
--- a/src/core/init.c
+++ b/src/core/init.c
@@ -215,9 +215,6 @@ PACK_STRUCT_END
 #if !LWIP_ETHERNET && (LWIP_ARP || PPPOE_SUPPORT)
   #error "LWIP_ETHERNET needs to be turned on for LWIP_ARP or PPPOE_SUPPORT"
 #endif
-#if (LWIP_IGMP || LWIP_IPV6) && !defined(LWIP_RAND)
-  #error "When using IGMP or IPv6, LWIP_RAND() needs to be defined to a random-function returning an u32_t random value (in arch/cc.h)"
-#endif
 #if LWIP_TCPIP_CORE_LOCKING_INPUT && !LWIP_TCPIP_CORE_LOCKING
   #error "When using LWIP_TCPIP_CORE_LOCKING_INPUT, LWIP_TCPIP_CORE_LOCKING must be enabled, too"
 #endif