diff --git a/doc/sphinx/arm/hooks-lease-cmds.rst b/doc/sphinx/arm/hooks-lease-cmds.rst
index 56fae773df..ba92617506 100644
--- a/doc/sphinx/arm/hooks-lease-cmds.rst
+++ b/doc/sphinx/arm/hooks-lease-cmds.rst
@@ -841,9 +841,10 @@ An example IPv4 lease deletion by ``"hw-address"`` is:
    }
 
 The IPv6 address leases are deleted the same way, but using :isccmd:`lease6-del`. The
-prefix IPv6 leases are also deleted using :isccmd:`lease6-del`, but with some extra
+IPv6 prefix leases are also deleted using :isccmd:`lease6-del`, but with some extra
 steps. The prefix should be referenced by its address and prefix length should be ignored.
-For example, to delete 2001:db8:1::/48, the following command can be used:
+For example, to delete 2001:db8:1::/48, the following command can be used. The
+``subnet-id`` parameter is optional.
 
 ::
 
diff --git a/src/hooks/dhcp/lease_cmds/lease_parser.cc b/src/hooks/dhcp/lease_cmds/lease_parser.cc
index 666659372f..c639c256c9 100644
--- a/src/hooks/dhcp/lease_cmds/lease_parser.cc
+++ b/src/hooks/dhcp/lease_cmds/lease_parser.cc
@@ -231,7 +231,7 @@ Lease6Parser::parse(ConstSrvConfigPtr& cfg,
             prefix_len = getUint8(lease_info, "prefix-len");
         } else {
             isc_throw(BadValue, "Incorrect lease type: " << txt << ", the only "
-                      "supported values are: IA_NA, and IA_PD");
+                      "supported values are: IA_NA and IA_PD");
         }
     }