diff --git a/net/ipv6/xfrm6_tunnel.c b/net/ipv6/xfrm6_tunnel.c
index 7af227bb1551..7931e4f898d4 100644
--- a/net/ipv6/xfrm6_tunnel.c
+++ b/net/ipv6/xfrm6_tunnel.c
@@ -135,7 +135,7 @@ u32 xfrm6_tunnel_spi_lookup(xfrm_address_t *saddr)
 	x6spi = __xfrm6_tunnel_spi_lookup(saddr);
 	spi = x6spi ? x6spi->spi : 0;
 	read_unlock_bh(&xfrm6_tunnel_spi_lock);
-	return spi;
+	return htonl(spi);
 }
 
 EXPORT_SYMBOL(xfrm6_tunnel_spi_lookup);
@@ -210,7 +210,7 @@ u32 xfrm6_tunnel_alloc_spi(xfrm_address_t *saddr)
 		spi = __xfrm6_tunnel_alloc_spi(saddr);
 	write_unlock_bh(&xfrm6_tunnel_spi_lock);
 
-	return spi;
+	return htonl(spi);
 }
 
 EXPORT_SYMBOL(xfrm6_tunnel_alloc_spi);