diff --git a/doc/airline.txt b/doc/airline.txt
index 9b5f00f8..02855ccb 100644
--- a/doc/airline.txt
+++ b/doc/airline.txt
@@ -225,7 +225,8 @@ section.
   let g:airline_section_x       (tagbar, filetype, virtualenv)
   let g:airline_section_y       (fileencoding, fileformat)
   let g:airline_section_z       (percentage, line number, column number)
-  let g:airline_section_warning (syntastic, whitespace)
+  let g:airline_section_error   (ycm_error_count)
+  let g:airline_section_warning (ycm_warning_count, syntastic, whitespace)
 
   " here is an example of how you could replace the branch indicator with
   " the current working directory, followed by the filename.
@@ -275,7 +276,7 @@ configuration values that you can use.
   (first array is the left side, second array is the right side). >
   let g:airline#extensions#default#layout = [
       \ [ 'a', 'b', 'c' ],
-      \ [ 'x', 'y', 'z', 'warning' ]
+      \ [ 'x', 'y', 'z', 'error', 'warning' ]
       \ ]
 <
 -------------------------------------                     *airline-quickfix*
@@ -625,6 +626,17 @@ vim-ctrlspace <https://github.com/szw/vim-ctrlspace>
 * enable/disable vim-ctrlspace integration >
   let g:airline#extensions#ctrlspace#enabled = 1
 <
+-------------------------------------                    *airline-ycm*
+YouCompleteMe <https://github.com/Valloric/YouCompleteMe>
+
+Shows number of errors and warnings in the current file detected by YCM.
+
+* set error count prefix >
+  let g:airline#extensions#ycm#error_symbol = 'E:'
+
+* set warning count prefix >
+  let g:airline#extensions#ycm#warning_symbol = 'W:'
+<
 ==============================================================================
 ADVANCED CUSTOMIZATION                      *airline-advanced-customization*