diff --git a/trunk/src/common/util.c b/trunk/src/common/util.c
index c004063381..9194602bd1 100644
--- a/trunk/src/common/util.c
+++ b/trunk/src/common/util.c
@@ -688,7 +688,7 @@ try_next_line:
 
 int is_internal_IP(uint32_t ip) {
 
-  if (((ip & 0xff000000) == 0xa0000000) || /*       10/8 */
+  if (((ip & 0xff000000) == 0x0a000000) || /*       10/8 */
       ((ip & 0xff000000) == 0x00000000) || /*        0/8 */
       ((ip & 0xff000000) == 0x7f000000) || /*      127/8 */
       ((ip & 0xffff0000) == 0xa9fe0000) || /* 169.254/16 */