diff --git a/doc/installation.md b/doc/installation.md
index 4f481dcb1..64b806391 100644
--- a/doc/installation.md
+++ b/doc/installation.md
@@ -501,4 +501,4 @@ The first release candidate of Icinga Web 2 introduces the following non-backwar
 
 ## <a id="upgrading-to-2.1.x"></a> Upgrading to Icinga Web 2 2.1.x
 
-Icinga Web 2 2.1.x does not introduce any backward incompatible change.
+* Since Icinga Web 2 version 2.1.3 LDAP user group backends respect the configuration option `group_filter`.