diff --git a/TODO.md b/TODO.md
index 1d908e5..9d25995 100644
--- a/TODO.md
+++ b/TODO.md
@@ -1,6 +1,6 @@
 ## TODO
 
-  * improve naming in accordance with https://prometheus.io/docs/instrumenting/writing_exporters/#naming
+  * improve naming in perf.go in accordance with https://prometheus.io/docs/instrumenting/writing_exporters/#naming
   * perf: export all disks ... currently only first disk is exported
   * use help text to indicate underlying WMI metrics, rather than human-readable text