diff --git a/bsd/porting/netport.h b/bsd/porting/netport.h
index 9354640379ab976b276afb60442ba38bc684d02d..bd9cc7553c187b6b99eb749fc2b24010d31e43a8 100644
--- a/bsd/porting/netport.h
+++ b/bsd/porting/netport.h
@@ -176,6 +176,17 @@ typedef uintptr_t __uintptr_t;
 #undef INVARIANTS
 #endif
 
+
+#undef htonl
+#undef htons
+#undef ntohl
+#undef ntohs
+uint32_t	 htonl(uint32_t);
+uint16_t	 htons(uint16_t);
+uint32_t	 ntohl(uint32_t);
+uint16_t	 ntohs(uint16_t);
+
+
 struct malloc_type {
     int unused;
 };