diff --git a/nixos/modules/virtualisation/azure-agent.nix b/nixos/modules/virtualisation/azure-agent.nix
index 81413792eda0..41f3fa0e6642 100644
--- a/nixos/modules/virtualisation/azure-agent.nix
+++ b/nixos/modules/virtualisation/azure-agent.nix
@@ -146,7 +146,7 @@ in
 
     services.logrotate = {
       enable = true;
-      config = ''
+      extraConfig = ''
         /var/log/waagent.log {
             compress
             monthly