diff --git a/l2tp.sh b/l2tp.sh
index 6d55b53..99656f1 100644
--- a/l2tp.sh
+++ b/l2tp.sh
@@ -351,6 +351,7 @@ conn l2tp-psk-nonat
     dpddelay=40
     dpdtimeout=130
     dpdaction=clear
+    sha2-truncbug=yes
 EOF
 
     cat > /etc/ipsec.secrets<<EOF