diff --git a/sensible.tmux b/sensible.tmux
index 9d6fcf5..3993296 100755
--- a/sensible.tmux
+++ b/sensible.tmux
@@ -46,6 +46,7 @@ server_option_value_not_changed() {
 
 key_binding_not_set() {
 	local key="$1"
+	if [[ ${key} == '\' ]]; then key='\\'; fi
 	if $(tmux list-keys | grep -q "${KEY_BINDING_REGEX}${key}[[:space:]]"); then
 		return 1
 	else