1 files changed, 13 insertions, 0 deletions

diff --git a/usage.h b/usage.h
index dc3b49816..8ec0170e2 100644
--- a/usage.h
+++ b/usage.h
@@ -1,3 +1,16 @@
+#define adjtimex_trivial_usage \
+        "[-q] [-o offset] [-f frequency] [-p timeconstant] [-t tick]"
+#define adjtimex_full_usage \
+        "Reads and optionally sets system timebase parameters.\n" \
+        "See adjtimex(2).\n\n" \
+        "Options:\n" \
+        "\t-q\t\tquiet mode - do not print\n" \
+        "\t-o offset\ttime offset, microseconds\n" \
+        "\t-f frequency\tfrequency adjust, integer kernel units (65536 is 1ppm)\n" \
+        "\t\t\t(positive values make the system clock run fast)\n" \
+        "\t-t tick\t\tmicroseconds per tick, usually 10000\n" \
+        "\t-p timeconstant\n"
+
 #define ar_trivial_usage \
         "-[ovR]{ptx} archive filenames"
 #define ar_full_usage \