diff --git a/CHANGES b/CHANGES
index 39a69a9772..08b3b92b7a 100644
--- a/CHANGES
+++ b/CHANGES
@@ -1,3 +1,6 @@
+4244.	[bug]		The parser was not reporting that use-ixfr is obsolete.
+			[RT #41010]
+
 4241.	[doc]		Improved the TSIG, TKEY, and SIG(0) sections in
 			the ARM. [RT #40955]
 
diff --git a/bin/named/config.c b/bin/named/config.c
index cab6f1fd0d..4798272ac3 100644
--- a/bin/named/config.c
+++ b/bin/named/config.c
@@ -103,9 +103,9 @@ options {\n\
 	transfers-per-ns 2;\n\
 	transfers-in 10;\n\
 	transfers-out 10;\n\
-	treat-cr-as-space true;\n\
-	use-id-pool true;\n\
-	use-ixfr true;\n\
+#	treat-cr-as-space <obsolete>;\n\
+#	use-id-pool <obsolete>;\n\
+#	use-ixfr <obsolete>;\n\
 	edns-udp-size 4096;\n\
 	max-udp-size 4096;\n\
 	request-nsid false;\n\
diff --git a/bin/named/named.conf.docbook b/bin/named/named.conf.docbook
index 65a5cf0a5f..01cb62aaa0 100644
--- a/bin/named/named.conf.docbook
+++ b/bin/named/named.conf.docbook
@@ -235,7 +235,6 @@ options {
 	transfers-per-ns <replaceable>integer</replaceable>;
 	transfers-in <replaceable>integer</replaceable>;
 	transfers-out <replaceable>integer</replaceable>;
-	use-ixfr <replaceable>boolean</replaceable>;
 	version ( <replaceable>quoted_string</replaceable> | none );
 	allow-recursion { <replaceable>address_match_element</replaceable>; ... };
 	allow-recursion-on { <replaceable>address_match_element</replaceable>; ... };
@@ -395,6 +394,7 @@ options {
 	serial-queries <replaceable>integer</replaceable>; // obsolete
 	treat-cr-as-space <replaceable>boolean</replaceable>; // obsolete
 	use-id-pool <replaceable>boolean</replaceable>; // obsolete
+	use-ixfr <replaceable>boolean</replaceable>; // obsolete
 };
 </literallayout>
   </refsection>
diff --git a/lib/isccfg/namedconf.c b/lib/isccfg/namedconf.c
index 3235d26bb3..d95a03a614 100644
--- a/lib/isccfg/namedconf.c
+++ b/lib/isccfg/namedconf.c
@@ -1008,7 +1008,7 @@ options_clauses[] = {
 	{ "transfers-out", &cfg_type_uint32, 0 },
 	{ "treat-cr-as-space", &cfg_type_boolean, CFG_CLAUSEFLAG_OBSOLETE },
 	{ "use-id-pool", &cfg_type_boolean, CFG_CLAUSEFLAG_OBSOLETE },
-	{ "use-ixfr", &cfg_type_boolean, 0 },
+	{ "use-ixfr", &cfg_type_boolean, CFG_CLAUSEFLAG_OBSOLETE },
 	{ "use-v4-udp-ports", &cfg_type_bracketed_portlist, 0 },
 	{ "use-v6-udp-ports", &cfg_type_bracketed_portlist, 0 },
 	{ "version", &cfg_type_qstringornone, 0 },