diff --git a/README.md b/README.md
index 62d5d177b226039148d4bf6e689b5da51c6b1064..703b78f7da3b3c1655dc8f231cf89349b39ec4f4 100644
--- a/README.md
+++ b/README.md
@@ -200,6 +200,9 @@ Following mappings are set locally, for magit buffer only, in normal mode.
 ##### CF
  * Amend the staged changes into the previous commit, without modifying previous commit message.
 
+##### CU
+ * Close a commit section (If you need soon after open or editing commit message, pressing 'u' is good enough).
+
 ##### I
  * Add the file under the cursor in .gitgnore
 
diff --git a/doc/vimagit.txt b/doc/vimagit.txt
index 144e49e42f1c6212a0a31e2b635f4e9c319ed622..94115a6f4007e4237ca25c382fe9954943851785 100644
--- a/doc/vimagit.txt
+++ b/doc/vimagit.txt
@@ -236,6 +236,11 @@ Following mappings are set locally, for magit buffer only, in normal mode.
   CF        Amend the staged changes into the previous commit, without
             modifying previous commit message
 
+                                    *vimagit-CU*      *magit#close_commit()*
+                                    *vimagit-g:magit_close_commit_mapping*
+  CU        Close a commit section (If you need soon after open or editing
+            Ucommit message, pressing 'u' is good enough).
+
                                     *vimagit-I*              *magit#ignore_file()*
                                     *vimagit-g:magit_ignore_mapping*
   I         Add the file under the cursor in .gitgnore