diff --git a/doc/src/sgml/ref/pg_receivexlog.sgml b/doc/src/sgml/ref/pg_receivexlog.sgml
index 78c105cc18a96c2142706bc776d46c7cd83526be..7c50b01a57b982a28136fca8fa853fa054c36e19 100644
--- a/doc/src/sgml/ref/pg_receivexlog.sgml
+++ b/doc/src/sgml/ref/pg_receivexlog.sgml
@@ -227,7 +227,7 @@ PostgreSQL documentation
      </varlistentry>
 
      <varlistentry>
-      <term><option>--slot</option></term>
+      <term><option>--slot=<replaceable class="parameter">slotname</replaceable></option></term>
       <listitem>
         <para>
          Require <application>pg_receivexlog</application> to use an existing
diff --git a/src/bin/pg_basebackup/pg_receivexlog.c b/src/bin/pg_basebackup/pg_receivexlog.c
index 2478789ca21f7941b0a5a68c83ddecc703247860..c233779b89cddd5a6a7d1be7f502b2f597ac85e4 100644
--- a/src/bin/pg_basebackup/pg_receivexlog.c
+++ b/src/bin/pg_basebackup/pg_receivexlog.c
@@ -74,7 +74,7 @@ usage(void)
 	printf(_("  -U, --username=NAME    connect as specified database user\n"));
 	printf(_("  -w, --no-password      never prompt for password\n"));
 	printf(_("  -W, --password         force password prompt (should happen automatically)\n"));
-	printf(_("      --slot             replication slot to use\n"));
+	printf(_("      --slot=SLOTNAME    replication slot to use\n"));
 	printf(_("\nReport bugs to <pgsql-bugs@postgresql.org>.\n"));
 }