diff --git a/README.md b/README.md
index 739aae7..29f919c 100644
--- a/README.md
+++ b/README.md
@@ -145,6 +145,8 @@ let g:signify_skip_filetype = { 'vim': 1, 'c': 1 }
 let g:signify_skip_filename = { '/home/user/.vimrc': 1 }
 ```
 
+__NOTE__: Filenames have to be absolute paths!
+
 #### good documentation
 
 You should know by now!
diff --git a/doc/signify.txt b/doc/signify.txt
index 9363cbd..6f592ec 100644
--- a/doc/signify.txt
+++ b/doc/signify.txt
@@ -118,6 +118,7 @@ Mapping for toggling the plugin for the current buffer only.
     let g:signify_skip_filename = { '/home/user/.vimrc': 1 }
 
 Don't activate the plugin for these filetypes and/or filenames.
+NOTE: Filenames have to be absolute paths.
 
 
     let g:signify_sign_overwrite = 1