diff --git a/plugin/NERD_commenter.vim b/plugin/NERD_commenter.vim
index b7d9dfc..a2c4796 100644
--- a/plugin/NERD_commenter.vim
+++ b/plugin/NERD_commenter.vim
@@ -659,6 +659,8 @@ function s:SetUpForNewFiletype(filetype, forceReset)
         call s:MapDelimiters('#', '')
     elseif a:filetype ==? "tli"
         call s:MapDelimiters('#', '')
+    elseif a:filetype ==? "tmux"
+        call s:MapDelimiters('#', '')
     elseif a:filetype ==? "trasys"
         call s:MapDelimiters("$", "")
     elseif a:filetype ==? "tsalt"