diff --git a/znc/content.md b/znc/content.md
index 3b24580eb..d3523cfb5 100644
--- a/znc/content.md
+++ b/znc/content.md
@@ -29,3 +29,5 @@ often blocked by web browsers, and therefore is not recommended.
 
 If you use any external module, put the .cpp, .py or .pm file to
 `/znc-data/modules` (you may need to create that directory).
+
+IPv6 is currently disabled in this image.