diff --git a/nixos/modules/services/computing/slurm/slurm.nix b/nixos/modules/services/computing/slurm/slurm.nix
index 77b9c40577a3..d9a201dc7ed8 100644
--- a/nixos/modules/services/computing/slurm/slurm.nix
+++ b/nixos/modules/services/computing/slurm/slurm.nix
@@ -183,7 +183,7 @@ in
       };
 
       procTrackType = mkOption {
-        type = types.string;
+        type = types.str;
         default = "proctrack/linuxproc";
         description = ''
           Plugin to be used for process tracking on a job step basis.