diff --git a/src/bin/dhcp4/dhcp4_hooks.dox b/src/bin/dhcp4/dhcp4_hooks.dox
index 02b531efdd..b88f76b986 100644
--- a/src/bin/dhcp4/dhcp4_hooks.dox
+++ b/src/bin/dhcp4/dhcp4_hooks.dox
@@ -288,8 +288,8 @@ called before "subnet4_select".
 
  - @b Arguments:
    - name: @b query4, type: isc::dhcp::Pkt4Ptr, direction: <b>in</b>
-   - name: @b leases4, type: isc::dhcp::Leases4CollectionPtr, direction: <b>in</b>
-   - name: @b deleted_leases4, type: isc::dhcp::Leases4CollectionPtr, direction: <b>in</b>
+   - name: @b leases4, type: isc::dhcp::Lease4CollectionPtr, direction: <b>in</b>
+   - name: @b deleted_leases4, type: isc::dhcp::Lease4CollectionPtr, direction: <b>in</b>
 
  - @b Description: this callout is executed when the server has applied all
    lease changes as a result of DHCP message processing. This includes
diff --git a/src/bin/dhcp6/dhcp6_hooks.dox b/src/bin/dhcp6/dhcp6_hooks.dox
index ebfb2a6abf..a7afd1ae7e 100644
--- a/src/bin/dhcp6/dhcp6_hooks.dox
+++ b/src/bin/dhcp6/dhcp6_hooks.dox
@@ -339,8 +339,8 @@ called before "subnet6_select".
 
  - @b Arguments:
    - name: @b query6, type: isc::dhcp::Pkt6Ptr, direction: <b>in</b>
-   - name: @b leases6, type: isc::dhcp::Leases6CollectionPtr, direction: <b>in</b>
-   - name: @b deleted_leases6, type: isc::dhcp::Leases6CollectionPtr, direction: <b>in</b>
+   - name: @b leases6, type: isc::dhcp::Lease6CollectionPtr, direction: <b>in</b>
+   - name: @b deleted_leases6, type: isc::dhcp::Lease6CollectionPtr, direction: <b>in</b>
 
  - @b Description: this callout is executed when the server has
    applied all lease changes as a result of DHCP message