diff --git a/src/xdpfw_kern.c b/src/xdpfw_kern.c
index 163cb61..88a1058 100644
--- a/src/xdpfw_kern.c
+++ b/src/xdpfw_kern.c
@@ -139,7 +139,7 @@ int xdp_prog_main(struct xdp_md *ctx)
 
         srcip6 |= (uint128_t) iph6->saddr.in6_u.u6_addr32[0] << 0;
         srcip6 |= (uint128_t) iph6->saddr.in6_u.u6_addr32[1] << 32;
-        srcip6 |= (uint128_t) iph6->saddr.in6_u.u6_addr32[2] << 48;
+        srcip6 |= (uint128_t) iph6->saddr.in6_u.u6_addr32[2] << 64;
         srcip6 |= (uint128_t) iph6->saddr.in6_u.u6_addr32[3] << 96;
     }
     else