spelling: acknowledgment

diff --git a/src/lib/dhcp_ddns/libdhcp_ddns.dox b/src/lib/dhcp_ddns/libdhcp_ddns.dox
index 2cca1f602a50858625a359e028b0f46d8c54fae5..c03e30c77863f266cc6826f03b7c3d37cbf99cfe 100644 (file)
--- a/src/lib/dhcp_ddns/libdhcp_ddns.dox
+++ b/src/lib/dhcp_ddns/libdhcp_ddns.dox
@@ -48,7 +48,7 @@ only transport supported is via UDP Sockets.
 
 The UDP implementation is provided by isc::dhcp_ddns::NameChangeUDPSender
 and isc::dhcp_ddns::NameChangeUDPListener.  The implementation is strictly
-unidirectional: there is no explicit acknowledgement of receipt of a
+unidirectional: there is no explicit acknowledgment of receipt of a
 request so, as it is UDP, no guarantee of delivery.
 
 */