diff --git a/nixos/modules/services/monitoring/netdata.nix b/nixos/modules/services/monitoring/netdata.nix
index 60dfcb769350..b60ec85e7deb 100644
--- a/nixos/modules/services/monitoring/netdata.nix
+++ b/nixos/modules/services/monitoring/netdata.nix
@@ -159,7 +159,7 @@ in {
         '';
       };
 
-      claim_token_file = mkOption {
+      claimTokenFile = mkOption {
         type = types.nullOr types.path;
         default = null;
         description = lib.mdDoc ''