diff --git a/README.markdown b/README.markdown
index 20aabc6..2a562b4 100644
--- a/README.markdown
+++ b/README.markdown
@@ -72,7 +72,13 @@ let g:formatprg_cs = "astyle"
 let g:formatprg_args_cs = "--mode=cs --style=ansi -p -c -H"
 ```
 
-The default tabwidth is set to 4 for all formatprograms as well as for vim itself.
+The default tabwidth is set to 4 for all formatprograms as well as for vim itself.  
+It overwrites *tabstop*, *softtabstop*, *shiftwidth* in vimrc. If you want to keep your settings, you have to use *g:autoformat_default* variable. For example:
+```vim
+let g:autoformat_default = 2
+```
+
+
 If you change the tabwidth for a certain formatprogram, I would suggest to change the indent options of vim correspondingly for that filetype.
 
 ```vim
diff --git a/plugin/defaults.vim b/plugin/defaults.vim
index 60802cc..78785a6 100644
--- a/plugin/defaults.vim
+++ b/plugin/defaults.vim
@@ -35,9 +35,14 @@ if !exists("g:formatprg_args_javascript")
     let g:formatprg_args_javascript = "-i"
 endif
 
-
 "Set default indent behaviour to match with the formatprg defaults
 set expandtab
-set tabstop=4
-set softtabstop=4
-set shiftwidth=4
+if !exists("g:autoformat_default")
+    set tabstop     = 4
+    set softtabstop = 4
+    set shiftwidth  = 4
+else
+    execute "set tabstop=".g:autoformat_default
+    execute "set softtabstop=".g:autoformat_default
+    execute "set shiftwidth=".g:autoformat_default
+endif