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-rwxr-xr-x[-rw-r--r--]src/vnet/ip/ip_packet.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/vnet/ip/ip_packet.h b/src/vnet/ip/ip_packet.h
index d862caa3a52..837b3df8563 100644..100755
--- a/src/vnet/ip/ip_packet.h
+++ b/src/vnet/ip/ip_packet.h
@@ -301,7 +301,7 @@ always_inline u16
ip_csum_fold (ip_csum_t c)
{
/* Reduce to 16 bits. */
-#ifdef __x86_64__
+#if defined(__x86_64__) && defined(__BMI2__)
u64 tmp;
asm volatile(
/* using ADC is much faster than mov, shift, add sequence