diff --git a/packages/mosaic/framework/tools/wake/validate-973/check-973.py b/packages/mosaic/framework/tools/wake/validate-973/check-973.py
index db396758..5110cde7 100755
--- a/packages/mosaic/framework/tools/wake/validate-973/check-973.py
+++ b/packages/mosaic/framework/tools/wake/validate-973/check-973.py
@@ -26,7 +26,7 @@ Subcommands (all print sorted, stable output; non-zero exit on any failure):
   arms       The forced-error arm list: the 19 denominator canaries plus one
              E-form arm (store-ack:733→740, a $(count_lines) capture compared
              afterward — the A6 shape) plus one F-form arm (quarantine:560→567,
-             the multi-grep pipeline capture), as "<helper> <file>:<line+3>
+             the multi-grep pipeline capture), as "<helper> <file>:<line+7>
              <form>". Both extras are asserted to exist in the artifact with
              the expected form — a renumber that moved them fails here, not
              silently downstream.