diff --git a/ipv6.sh b/ipv6.sh
index c013ed6..00b0dda 100755
--- a/ipv6.sh
+++ b/ipv6.sh
@@ -1,6 +1,6 @@
 #!/bin/sh
 
 # Enable IPV6 if needed
-if test -z "$IPV6_DISABLE"; then
+if [[ "${IPV6_DISABLE}" == "1" ]]; then
 	echo '$SERVER["socket"] == "[::]:" + env.PORT {  }'
 fi