diff --git a/.vimrc b/.vimrc
index f2f6ee9..4ef6946 100644
--- a/.vimrc
+++ b/.vimrc
@@ -337,16 +337,16 @@ set splitbelow
 set splitright
 " if multiple windows
 if bufwinnr(1)
-        " vertically increase/decrease window size with alt+up/alt+down
-        nnoremap <M-Up>    :TmuxNavigateUp<cr>
-        nnoremap <M-Right> :TmuxNavigateRight<cr>
-        imap <M-Up>    <ESC>:TmuxNavigateUp<cr>
-        imap <M-Right> <ESC>:TmuxNavigateRight<cr>
-        "        " horizontally increase/decrease window size with alt+right/alt+left
-        nnoremap <M-Left>  :TmuxNavigateLeft<cr>
-        nnoremap <M-Down>  :TmuxNavigateDown<cr>
-        imap <M-Left>  <ESC>:TmuxNavigateLeft<cr>
-        imap <M-Down>  <ESC>:TmuxNavigateDown<cr>
+        if $TERM == "screen"
+                nnoremap <M-Up>    :TmuxNavigateUp<cr>
+                nnoremap <M-Right> :TmuxNavigateRight<cr>
+                imap <M-Up>    <ESC>:TmuxNavigateUp<cr>
+                imap <M-Right> <ESC>:TmuxNavigateRight<cr>
+                nnoremap <M-Left>  :TmuxNavigateLeft<cr>
+                nnoremap <M-Down>  :TmuxNavigateDown<cr>
+                imap <M-Left>  <ESC>:TmuxNavigateLeft<cr>
+                imap <M-Down>  <ESC>:TmuxNavigateDown<cr>
+        endif
         " switch to next/previous tab with ctrl+right/ctrl+left
         map <C-Right> gt
         map <C-Left> gT