diff --git a/lib/roken/getifaddrs.c b/lib/roken/getifaddrs.c
index 93e9010ab..5ef1cf825 100644
--- a/lib/roken/getifaddrs.c
+++ b/lib/roken/getifaddrs.c
@@ -223,9 +223,13 @@ print_addr(const char *s, struct sockaddr *sa)
 {
     int i;
     printf("  %s=%d/", s, sa->sa_family);
-    for(i = 0; i < sa->sa_len - ((long)sa->sa_data - (long)&sa->sa_family); i++) {
+#ifdef HAVE_STRUCT_SOCKADDR_SA_LEN
+    for(i = 0; i < sa->sa_len - ((long)sa->sa_data - (long)&sa->sa_family); i++)
 	printf("%02x", ((unsigned char*)sa->sa_data)[i]);
-    }
+#else
+    for(i = 0; i < sizeof(sa->sa_data); i++) 
+	printf("%02x", ((unsigned char*)sa->sa_data)[i]);
+#endif
     printf("\n");
 }