diff --git a/vpnsetup.sh b/vpnsetup.sh
index 2ea82f9..e72daf5 100755
--- a/vpnsetup.sh
+++ b/vpnsetup.sh
@@ -218,6 +218,7 @@ conn shared
   dpdaction=clear
   ike=3des-sha1,aes-sha1,aes256-sha2_512,aes256-sha2_256
   phase2alg=3des-sha1,aes-sha1,aes256-sha2_512,aes256-sha2_256
+  sha2-truncbug=yes
 
 conn l2tp-psk
   auto=add
diff --git a/vpnsetup_centos.sh b/vpnsetup_centos.sh
index 27c77de..1da1918 100755
--- a/vpnsetup_centos.sh
+++ b/vpnsetup_centos.sh
@@ -205,6 +205,7 @@ conn shared
   dpdaction=clear
   ike=3des-sha1,aes-sha1,aes256-sha2_512,aes256-sha2_256
   phase2alg=3des-sha1,aes-sha1,aes256-sha2_512,aes256-sha2_256
+  sha2-truncbug=yes
 
 conn l2tp-psk
   auto=add