diff --git a/autoload/nerdtree.vim b/autoload/nerdtree.vim
index b0275a0..63fa5c1 100644
--- a/autoload/nerdtree.vim
+++ b/autoload/nerdtree.vim
@@ -133,7 +133,7 @@ endfunction
 
 "FUNCTION: nerdtree#runningWindows(dir) {{{2
 function! nerdtree#runningWindows()
-    return has("win16") || has("win32") || has("win64") || has("win32unix")
+    return has("win16") || has("win32") || has("win64")
 endfunction
 
 " SECTION: View Functions {{{1