diff --git a/doc/requirements.in b/doc/requirements.in
index 9cbe4deb823..8c26d7a66d1 100644
--- a/doc/requirements.in
+++ b/doc/requirements.in
@@ -1,4 +1,5 @@
-# DOC: used to generate docs
+# DOC: additional dependencies required to generate docs.
+#      Follow the "Getting Started" guide first.
 
 sphinx<8.3.0
 sphinx_rtd_theme~=3.0