diff --git a/README.md b/README.md
index dfb21f8..eb64985 100644
--- a/README.md
+++ b/README.md
@@ -9,4 +9,4 @@ sh install.sh
 
 # Fix for shift+F6 in tmux (and screen probably)
 
-In tmux, do `infocmp > screen-256color`. Add the line `kf16=\E[17;2~,` and compile the file with tic. This will result in `~/.terminfo/s/screen-256color` with the correct keycode for shift+F6.
+In tmux, do `infocmp > screen-256color`. Add the line `kf16=\E[17;2~,` and compile the file with tic. This will result in `~/.terminfo/s/screen-256color` with the correct keycode for shift+F6. `.tmux.conf` needs the line `setw -g xterm-keys on` for it to register correctly.