diff --git a/nixos/modules/services/cluster/kubernetes.nix b/nixos/modules/services/cluster/kubernetes.nix
index 029b11ad98b7..a82802c32662 100644
--- a/nixos/modules/services/cluster/kubernetes.nix
+++ b/nixos/modules/services/cluster/kubernetes.nix
@@ -775,7 +775,7 @@ in {
             --bind-address=${cfg.proxy.address} \
             ${optionalString cfg.verbose "--v=6"} \
             ${optionalString cfg.verbose "--log-flush-frequency=1s"} \
-            ${cfg.controllerManager.extraOpts}
+            ${cfg.proxy.extraOpts}
           '';
           WorkingDirectory = cfg.dataDir;
         };