diff --git a/tools/perf/Documentation/perf-timechart.txt b/tools/perf/Documentation/perf-timechart.txt
index df98d1c82688a4efb6a59d28d254bdbda229ad60..ef0c7565bd5c61416fd4897f497d9f5dfad50eac 100644
--- a/tools/perf/Documentation/perf-timechart.txt
+++ b/tools/perf/Documentation/perf-timechart.txt
@@ -50,7 +50,9 @@ TIMECHART OPTIONS
 -p::
 --process::
         Select the processes to display, by name or PID
-
+-f::
+--force::
+	Don't complain, do it.
 --symfs=<directory>::
         Look for files with symbols relative to this directory.
 -n::