diff --git a/modules/services/web-servers/apache-httpd/zabbix.nix b/modules/services/web-servers/apache-httpd/zabbix.nix
index 385e9ab5644..6191d63584a 100644
--- a/modules/services/web-servers/apache-httpd/zabbix.nix
+++ b/modules/services/web-servers/apache-httpd/zabbix.nix
@@ -27,7 +27,6 @@ in
     ''
       post_max_size = 32M
       max_execution_time = 300
-      mbstring.func_overload = 2
     '';
 
   extraConfig = ''