man: document systemd-cgtop tool

1 files changed, 1 insertions, 1 deletions

diff --git a/src/cgtop.c b/src/cgtop.c
index 4624bc4af5..8b8617dc1c 100644
--- a/src/cgtop.c
+++ b/src/cgtop.c
@@ -499,7 +499,7 @@ static void help(void) {
                "  -m                  Order by memory load\n"
                "  -i                  Order by IO load\n"
                "  -d --delay=DELAY    Specify delay\n"
-               "     --depth=DEPTH    Maximum traversal depth\n",
+               "     --depth=DEPTH    Maximum traversal depth (default: 2)\n",
                program_invocation_short_name);
 }