diff --git a/nixos/modules/services/security/oauth2-proxy-nginx.nix b/nixos/modules/services/security/oauth2-proxy-nginx.nix
index af1878cd09dc..307d73adea3d 100644
--- a/nixos/modules/services/security/oauth2-proxy-nginx.nix
+++ b/nixos/modules/services/security/oauth2-proxy-nginx.nix
@@ -105,7 +105,7 @@ in
               add_header Set-Cookie $auth_cookie;
             '';
 
-            "/oauth2/auth" =
+            "= /oauth2/auth" =
               let
                 maybeQueryArg =
                   name: value: