diff --git a/doc/guides/diagnostic-tooling-support-tiers.md b/doc/guides/diagnostic-tooling-support-tiers.md
index 254f90ecadd5fd..5d935a29369a88 100644
--- a/doc/guides/diagnostic-tooling-support-tiers.md
+++ b/doc/guides/diagnostic-tooling-support-tiers.md
@@ -25,7 +25,7 @@ the following tiers.
   * The tool must have a guide or other documentation in the Node.js GitHub
     organization or website;
   * The tool must be working on all supported platforms;
-  * The tool must only be using APIs exposed by Nodejs as opposed to
+  * The tool must only be using APIs exposed by Node.js as opposed to
     its dependencies; and
   * The tool must be open source.