diff --git a/pkgs/stdenv/generic/check-meta.nix b/pkgs/stdenv/generic/check-meta.nix
index ac62ad30829..ba3c8eef20e 100644
--- a/pkgs/stdenv/generic/check-meta.nix
+++ b/pkgs/stdenv/generic/check-meta.nix
@@ -231,6 +231,7 @@ let
     timeout = int;
 
     # Weirder stuff that doesn't appear in the documentation?
+    maxSilent = int;
     knownVulnerabilities = listOf str;
     name = str;
     version = str;