diff --git a/core/includes/module.inc b/core/includes/module.inc
index c202b8e..e092610 100644
--- a/core/includes/module.inc
+++ b/core/includes/module.inc
@@ -819,6 +819,12 @@ function module_implements_reset() {
 
 /**
  * Retrieves a list of what hooks are explicitly declared.
+ *
+ * @return
+ *   An associative array whose keys are hook names and whose values are hook 
+ *   groups.
+ *
+ * @see hook_hook_info()
  */
 function module_hook_info() {
   // When this function is indirectly invoked from bootstrap_invoke_all() prior