diff --git a/geode-docs/basic_config/data_regions/region_naming.html.md.erb b/geode-docs/basic_config/data_regions/region_naming.html.md.erb
index f66fa6a8e094..ce6b54c1c1ee 100644
--- a/geode-docs/basic_config/data_regions/region_naming.html.md.erb
+++ b/geode-docs/basic_config/data_regions/region_naming.html.md.erb
@@ -25,6 +25,7 @@ follow these region naming guidelines.
 -   Characters permitted in region names are alphanumeric characters
 (`ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789`),
 period (`.`), underscore (`_`), square brackets (`[ ]`), hyphen (`-`), caret (`^`) and backquote (`` ` ``).
+-   Region names are case sensitive.
 -   Do not use the slash character (`/`).
 -   Do not begin region names with two underscore characters (`__`),
 as this is reserved for internal use.