diff --git a/doc_styleguide.md b/doc_styleguide.md
index 670af765f3a..db30a737f14 100644
--- a/doc_styleguide.md
+++ b/doc_styleguide.md
@@ -12,6 +12,7 @@ This styleguide recommends best practices to improve documentation and to keep i
 
 * Be brief and clear.
 
+* Whenever it applies, add documents in alphabetical order.
 
 ## When adding images to a document