diff --git a/CONTRIBUTING.adoc b/CONTRIBUTING.adoc
index 35dcd208e7..f61cd51774 100644
--- a/CONTRIBUTING.adoc
+++ b/CONTRIBUTING.adoc
@@ -4,6 +4,8 @@
 
 The following guidelines make the transition from the Windup Wiki pages to the Windup documentation GitHub smoother.
 
+* Name wiki pages using only letters, numbers and dashes. Do not include spaces, colons, or other special characters in page names.
+
 * Be sure to add a level 3 page heading at the top of each page. When compiled in a book, the Guide name is the top level, chapters are level 2, and the page is level  3.
 
 +