diff --git a/autoload/airline.vim b/autoload/airline.vim
index 6def0bf4..81d02c0b 100644
--- a/autoload/airline.vim
+++ b/autoload/airline.vim
@@ -106,10 +106,10 @@ function! s:get_statusline(winnr, active)
     let sl.=l:mode_color
     let sl.=s:get_section(a:winnr, 'z')
 
-    " if a:active
-    "   let warngroup = airline#themes#exec_highlight_separator('Al2', 'warningmsg')
-    "   let sl.='%(%#'.warngroup.'#'.g:airline_right_sep.'%#warningmsg#'.s:getwinvar(a:winnr, 'airline_section_warning', '').'%)'
-    " endif
+    if a:active
+      let warngroup = airline#themes#exec_highlight_separator('Al2', 'warningmsg')
+      let sl.='%(%#'.warngroup.'#'.g:airline_right_sep.'%#warningmsg#'.s:getwinvar(a:winnr, 'airline_section_warning', '').'%)'
+    endif
   endif
   return sl
 endfunction
diff --git a/autoload/airline/themes.vim b/autoload/airline/themes.vim
index 31d42444..ec3e1697 100644
--- a/autoload/airline/themes.vim
+++ b/autoload/airline/themes.vim
@@ -49,9 +49,6 @@ function! airline#themes#exec_highlight_separator(from, to)
   let l:from = airline#themes#get_highlight(a:from)
   let l:to = airline#themes#get_highlight(a:to)
   let group = a:from.'_to_'.a:to
-  exec printf('highlight %s guifg=%s guibg=%s ctermfg=%s ctermbg=%s',
-        \ group,
-        \ l:to[1], l:from[1],
-        \ l:to[3], l:from[3])
+  call airline#exec_highlight(group, [ l:to[1], l:from[1], l:to[3], l:from[3] ])
   return group
 endfunction