diff --git a/spec.p2/F_TX_only2nd.seq b/spec.p2/F_TX_only2nd.seq
index 86679cb..b7a5f07 100755
--- a/spec.p2/F_TX_only2nd.seq
+++ b/spec.p2/F_TX_only2nd.seq
@@ -145,7 +145,7 @@ __END__
   Tester                      Target
     |                           |
     |-------------------------->|
-    |   Echo Request (1st)      |
+    |   Echo Request (2nd)      |
     |                           |
     |                           |
     |   wait for 65 sec.        |