diff --git a/tmux.1 b/tmux.1
index f570c43c..fa9d2b55 100644
--- a/tmux.1
+++ b/tmux.1
@@ -3335,7 +3335,7 @@ Prefixing a time variable with
 will convert it to a string, so if
 .Ql #{window_activity}
 gives
-.Ql 1445765102,
+.Ql 1445765102 ,
 .Ql #{t:window_activity}
 gives
 .Ql Sun Oct 25 09:25:02 2015 .