diff --git a/README.markdown b/README.markdown
index 72e27ae..e8e465c 100644
--- a/README.markdown
+++ b/README.markdown
@@ -79,10 +79,10 @@ You can also start automatically the completion when entering '+' or '@' by
 adding the next lines to your vimrc:
 
     " Auto complete projects
-    au filetype todo imap + +<C-X><C-O>
+    au filetype todo imap <buffer> + +<C-X><C-O>
 
     " Auto complete contexts
-    au filetype todo imap @ @<C-X><C-O>
+    au filetype todo imap <buffer> @ @<C-X><C-O>
 
 The TodoComplete function is designed to complete projects (starting by '+')
 and context (starting by '@'). If you use it on a regular word, it will do a
diff --git a/doc/todo.txt b/doc/todo.txt
index 949fbc3..8fb150a 100644
--- a/doc/todo.txt
+++ b/doc/todo.txt
@@ -67,9 +67,10 @@ You can also start automatically the completion when entering '+' or '@' by
 adding the next lines to your vimrc:
 
 " Auto complete projects
-au filetype todo imap + +<C-X><C-O>
+au filetype todo imap <buffer> + +<C-X><C-O>
+
 " Auto complete contexts
-au filetype todo imap @ @<C-X><C-O>
+au filetype todo imap <buffer> @ @<C-X><C-O>
 
 ===============================================================================
 COMPLETION                                                      *todo-complete*