diff --git a/src/include/ipv4/lwip/ip_addr.h b/src/include/ipv4/lwip/ip_addr.h
index 0f66a935..806677e1 100644
--- a/src/include/ipv4/lwip/ip_addr.h
+++ b/src/include/ipv4/lwip/ip_addr.h
@@ -110,7 +110,7 @@ extern const struct ip_addr ip_addr_broadcast;
 
 #define ip_addr_isany(addr1) ((addr1) == NULL || (addr1)->addr == 0)
 
-u8_t ip_addr_isbroadcast(ip_addr *addr1, struct netif *netif);
+u8_t ip_addr_isbroadcast(struct ip_addr *addr, struct netif *netif);
 
 #if 0 /* replaced by function in ip_addr.c */
 #define ip_addr_isbroadcast(addr1, mask) (((((addr1)->addr) & ~((mask)->addr)) == \