diff --git a/man/man8/bridge.8 b/man/man8/bridge.8
index d45c7289..222a4381 100644
--- a/man/man8/bridge.8
+++ b/man/man8/bridge.8
@@ -308,6 +308,9 @@ link setting is configured on specified physical device
 .BI master
 link setting is configured on the software bridge (default)
 
+.TP
+.BR "\-t" , " \-timestamp"
+display current time when using monitor option.
 
 .SS bridge link show - list bridge port configuration.
 
diff --git a/man/man8/ip.8 b/man/man8/ip.8
index e6c2b32a..1bdee118 100644
--- a/man/man8/ip.8
+++ b/man/man8/ip.8
@@ -175,6 +175,10 @@ executes specified command over all objects, it depends if command supports this
 .BR "\-c" , " -color"
 Use color output.
 
+.TP
+.BR "\-t" , " \-timestamp"
+display current time when using monitor option.
+
 .SH IP - COMMAND SYNTAX
 
 .SS