diff --git a/phpstan.neon b/phpstan.neon
index 0f3e1910..dc0370a0 100644
--- a/phpstan.neon
+++ b/phpstan.neon
@@ -13,6 +13,7 @@ parameters:
 		- "~^Function (set_magic_quotes_runtime|mysql_)~" # PHP < 7 functions
 		- "~an unknown class OCI-?Lob~" # this looks like PHPStan bug
 		- "~^Variable \\$(adminer|connection|driver|drivers|error|permanent|translations) might not be defined~" # declared in bootstrap.inc.php
+		- "~^Constant LANG not found~" # defined in lang.inc.php
 		- "~expects int, float given~" # this will work
 		- "~expects bool~" # truthy values
 		- "~fread expects int<1, max>, 100000~" # 1e6