diff --git a/runtime/optwin.vim b/runtime/optwin.vim
index 674d962..7576cec 100644
--- a/runtime/optwin.vim
+++ b/runtime/optwin.vim
@@ -412,7 +412,7 @@
 call <SID>OptionG("hl", &hl)
 call append("$", "hlsearch\thighlight all matches for the last used search pattern")
 call <SID>BinOptionG("hls", &hls)
-if has("termtruecolor")
+if has("termguicolors")
   call append("$", "termguicolors\tuse GUI colors for the terminal")
   call <SID>BinOptionG("tgc", &gcol)
 endif