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-rw-r--r--nixos/modules/programs/shadow.nix2
1 files changed, 1 insertions, 1 deletions
diff --git a/nixos/modules/programs/shadow.nix b/nixos/modules/programs/shadow.nix
index 5a467e112c23..5c2ea07c5549 100644
--- a/nixos/modules/programs/shadow.nix
+++ b/nixos/modules/programs/shadow.nix
@@ -83,7 +83,7 @@ in
     security.pam.services =
       { chsh = { rootOK = true; };
         chfn = { rootOK = true; };
-        su = { rootOK = true; forwardXAuth = true; };
+        su = { rootOK = true; forwardXAuth = true; logFailures = true; };
         passwd = {};
         # Note: useradd, groupadd etc. aren't setuid root, so it
         # doesn't really matter what the PAM config says as long as it