1 files changed, 2 insertions, 1 deletions

diff --git a/include/usage.h b/include/usage.h
index bb814f1f8..543befca3 100644
--- a/include/usage.h
+++ b/include/usage.h
@@ -927,7 +927,7 @@ USE_FEATURE_DATE_ISOFMT( \
         "\t-H login_host\tLog login_host into the utmp file as the hostname"
 
 #define grep_trivial_usage \
-        "[-ihHnqvs" \
+        "[-ihHnqvso" \
         USE_FEATURE_GREP_EGREP_ALIAS("E") \
         USE_FEATURE_GREP_CONTEXT("ABC") \
         "] PATTERN [FILEs...]"
@@ -945,6 +945,7 @@ USE_FEATURE_DATE_ISOFMT( \
         "\t-s\tsuppress file open/read error messages\n" \
         "\t-c\tonly print count of matching lines\n" \
         "\t-f\tread PATTERN from file\n" \
+        "\t-o\tshow only the part of a line that matches PATTERN\n" \
         "\t-e\tPATTERN is a regular expression\n" \
         "\t-F\tPATTERN is a set of newline-separated strings" \
         USE_FEATURE_GREP_EGREP_ALIAS("\n\t-E\tPATTERN is an extended regular expression") \