diff --git a/setup.sh b/setup.sh
index 3539aef..9d947f1 100755
--- a/setup.sh
+++ b/setup.sh
@@ -277,7 +277,7 @@ setup_tmux(){
             ;;
     esac
 
-    _date= `date` cat <<__EOC__ >"$tmux_conf_local"
+    _date=`date` cat <<__EOC__ >"$tmux_conf_local"
 # $tmux_conf_local
 # Automatically generated by $0 at $_date