diff --git a/autoload/indent_guides.vim b/autoload/indent_guides.vim
index 99bf52f..a1aa032 100644
--- a/autoload/indent_guides.vim
+++ b/autoload/indent_guides.vim
@@ -100,7 +100,7 @@ endfunction
 "
 function! indent_guides#highlight_colors() abort
   if s:auto_colors
-    if has('gui_running') || has('nvim') || has('termguicolors')
+    if has('gui_running') || has('nvim') || (has('termguicolors') && &termguicolors)
       call indent_guides#gui_highlight_colors()
     else
       call indent_guides#basic_highlight_colors()