diff -Nur olsrd-0.5.1.orig/src/hashing.c olsrd-0.5.1/src/hashing.c
--- olsrd-0.5.1.orig/src/hashing.c	2007-07-03 17:31:40.000000000 +0200
+++ olsrd-0.5.1/src/hashing.c	2007-07-07 21:19:38.000000000 +0200
@@ -54,7 +54,7 @@
     olsr_u32_t hash;
     if(olsr_cnf->ip_version == AF_INET) {
         /* IPv4 */  
-        const olsr_u8_t * const v4x = (const char *)&address;
+        const olsr_u8_t * const v4x = (const olsr_u8_t *)&address->v4;
         hash = v4x[0] ^ v4x[1] ^ v4x[2] ^ v4x[3];
     } else {
         /* IPv6 */