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-rw-r--r--src/vnet/ip/ip.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/src/vnet/ip/ip.c b/src/vnet/ip/ip.c
index 0c4687d81a1..b6825c30709 100644
--- a/src/vnet/ip/ip.c
+++ b/src/vnet/ip/ip.c
@@ -254,8 +254,8 @@ ip6_mask_to_preflen (ip6_address_t * mask)
u8 first1, first0;
if (mask->as_u64[0] == 0 && mask->as_u64[1] == 0)
return 0;
- first1 = log2_first_set (mask->as_u64[1]);
- first0 = log2_first_set (mask->as_u64[0]);
+ first1 = log2_first_set (clib_net_to_host_u64 (mask->as_u64[1]));
+ first0 = log2_first_set (clib_net_to_host_u64 (mask->as_u64[0]));
if (first1 != 0)
return 128 - first1;