diff --git a/autoload/thematic/gui.vim b/autoload/thematic/gui.vim
index 30d31ca..1b1485a 100644
--- a/autoload/thematic/gui.vim
+++ b/autoload/thematic/gui.vim
@@ -176,7 +176,7 @@ function! thematic#gui#setTransparency(th) abort
   if l:tr > 100
     let l:tr = 100
   endif
-  if l:tr > 0
+  if l:tr >= 0
     try
       execute 'set transparency=' . l:tr
     catch