Index: VBoxNetFlt-linux.c
===================================================================
--- VBoxNetFlt-linux.c	(revision 103989)
+++ VBoxNetFlt-linux.c	(working copy)
@@ -1192,7 +1192,7 @@
             if (uProtocol == RTNETIPV4_PROT_TCP)
                 enmGsoType = PDMNETWORKGSOTYPE_IPV6_TCP;
             else if (uProtocol == RTNETIPV4_PROT_UDP)
-                enmGsoType = PDMNETWORKGSOTYPE_IPV4_UDP;
+                enmGsoType = PDMNETWORKGSOTYPE_IPV6_UDP;
             else
                 enmGsoType = PDMNETWORKGSOTYPE_INVALID;
             break;