diff --git a/nixos/modules/services/monitoring/netdata.nix b/nixos/modules/services/monitoring/netdata.nix
index d2b2b2f1747c..ebfbbf8f37c2 100644
--- a/nixos/modules/services/monitoring/netdata.nix
+++ b/nixos/modules/services/monitoring/netdata.nix
@@ -269,7 +269,7 @@ in {
         PrivateTmp = true;
         ProtectControlGroups = true;
         PrivateMounts = true;
-      } // (lib.optionalAttrs (cfg.claim_token_file != null) {
+      } // (lib.optionalAttrs (cfg.claimTokenFile != null) {
         LoadCredential = [
           "netdata_claim_token:${cfg.claimTokenFile}"
         ];