diff --git a/cmd/zdb/zdb.c b/cmd/zdb/zdb.c
index 04a10c4eed..9568d2bbfe 100644
--- a/cmd/zdb/zdb.c
+++ b/cmd/zdb/zdb.c
@@ -794,7 +794,7 @@ usage(void)
 	    "\t\t[-o <var>=<value>]... [-t <txg>] [-U <cache>] [-x <dumpdir>]\n"
 	    "\t\t[-K <key>] <poolname>/<objset id> [<backupflags>]\n"
 	    "\t%s [-v] <bookmark>\n"
-	    "\t%s -C [-A] [-U <cache>]\n"
+	    "\t%s -C [-A] [-U <cache>] [<poolname>]\n"
 	    "\t%s -l [-Aqu] <device>\n"
 	    "\t%s -m [-AFLPX] [-e [-V] [-p <path> ...]] [-t <txg>] "
 	    "[-U <cache>]\n\t\t<poolname> [<vdev> [<metaslab> ...]]\n"
diff --git a/man/man8/zdb.8 b/man/man8/zdb.8
index 031953c543..52c8e452fa 100644
--- a/man/man8/zdb.8
+++ b/man/man8/zdb.8
@@ -14,7 +14,7 @@
 .\" Copyright (c) 2017 Lawrence Livermore National Security, LLC.
 .\" Copyright (c) 2017 Intel Corporation.
 .\"
-.Dd June 4, 2023
+.Dd June 27, 2023
 .Dt ZDB 8
 .Os
 .
@@ -51,6 +51,7 @@
 .Fl C
 .Op Fl A
 .Op Fl U Ar cache
+.Op Ar poolname
 .Nm
 .Fl E
 .Op Fl A