diff --git a/nixos/modules/services/hardware/thinkfan.nix b/nixos/modules/services/hardware/thinkfan.nix
index 018e82e58a3d..5a898631e090 100644
--- a/nixos/modules/services/hardware/thinkfan.nix
+++ b/nixos/modules/services/hardware/thinkfan.nix
@@ -55,7 +55,7 @@ in {
       enable = mkOption {
         default = false;
         description = ''
-          Whether to enable thinkfan, fan controller for ibm/lenovo thinkpads.
+          Whether to enable thinkfan, fan controller for IBM/Lenovo ThinkPads.
         '';
       };