1 files changed, 4 insertions, 2 deletions

diff --git a/include/usage.h b/include/usage.h
index 6f8558800..094eae8d9 100644
--- a/include/usage.h
+++ b/include/usage.h
@@ -2620,9 +2620,11 @@
         "Mon Dec 17 10:31:44 GMT 2000" 
 
 #define watchdog_trivial_usage \
-        "DEV"
+        "[-t <seconds>] DEV"
 #define watchdog_full_usage \
-        "Periodically write to watchdog device DEV"
+        "Periodically write to watchdog device DEV.\n" \
+        "Options:\n" \
+        "\t-t\tTimer period in seconds - default is 30."
 
 #define wc_trivial_usage \
         "[OPTION]... [FILE]..."