Index: include/clang-c/Index.h
===================================================================
--- include/clang-c/Index.h
+++ include/clang-c/Index.h
@@ -2259,8 +2259,19 @@
    */
   CXCursor_UnexposedAttr                 = 400,
 
+  /**
+   * \brief Interface Builder's @IBAction attribute.
+   */
   CXCursor_IBActionAttr                  = 401,
+
+  /**
+   * \brief Interface Builder's @IBOutlet attribute.
+   */
   CXCursor_IBOutletAttr                  = 402,
+
+  /**
+   * \brief Interface Builder's @IBOutletCollection attribute.
+   */
   CXCursor_IBOutletCollectionAttr        = 403,
   CXCursor_CXXFinalAttr                  = 404,
   CXCursor_CXXOverrideAttr               = 405,