diff --git a/debian/wit-network-config.postinst b/debian/wit-network-config.postinst
index 0e01de7..c138e8d 100755
--- a/debian/wit-network-config.postinst
+++ b/debian/wit-network-config.postinst
@@ -322,6 +322,9 @@ case "$1" in
                 let i+=1
             done
 
+	    [ -z $IPSEC_IPV4_SUBNETS ] && exit 2
+	    [ -z $IPSEC_IPV6_SUBNETS ] && exit 2
+
      ## STOP compiling frr config