diff --git a/autoload/airline/extensions/capslock.vim b/autoload/airline/extensions/capslock.vim
index 689b561..32aaf39 100644
--- a/autoload/airline/extensions/capslock.vim
+++ b/autoload/airline/extensions/capslock.vim
@@ -5,7 +5,7 @@ if !exists('*CapsLockStatusline')
 endif
 
 function! airline#extensions#capslock#status()
-  return CapsLockStatusline() == '[caps]' ? 'CAPS' : ''
+  return tolower(CapsLockStatusline()) == '[caps]' ? 'CAPS' : ''
 endfunction
 
 function! airline#extensions#capslock#init(ext)