diff --git a/src/Core/Config.php b/src/Core/Config.php
index f974e2fff2..44556a6017 100644
--- a/src/Core/Config.php
+++ b/src/Core/Config.php
@@ -48,6 +48,8 @@ class Config
 	 * @brief Get a particular user's config variable given the category name
 	 * ($family) and a key.
 	 *
+	 * Note: Please do not store booleans - convert to 0/1 integer values!
+	 *
 	 * @param string  $cat        The category of the configuration value
 	 * @param string  $key           The configuration key to query
 	 * @param mixed   $default_value optional, The value to return if key is not set (default: null)