diff --git a/sys/net/sixlowpan/ip.c b/sys/net/sixlowpan/ip.c
index 2505079f70..081692f0cd 100644
--- a/sys/net/sixlowpan/ip.c
+++ b/sys/net/sixlowpan/ip.c
@@ -131,7 +131,7 @@ uint8_t ipv6_register_packet_handler(int pid)
 {
     uint8_t i;
 
-    for (i = 0; ((sixlowip_reg[i] != pid) && (i < SIXLOWIP_MAX_REGISTERED) &&
+    for (i = 0; ((i < SIXLOWIP_MAX_REGISTERED) && (sixlowip_reg[i] != pid) && 
                  (sixlowip_reg[i] != 0)); i++) {
         ;
     }