diff --git a/CHANGES b/CHANGES
index e75438868b..eac1325801 100644
--- a/CHANGES
+++ b/CHANGES
@@ -1,3 +1,7 @@
+4659.   [bug]           Remove spurious log message about lmdb-mapsize
+			not being supported when parsing builtin
+			configuration file. [RT #45618]
+
 4658.	[bug]		Clean up build directory created by "setup.py install"
 			immediately.  [RT #45628]
 
diff --git a/bin/named/config.c b/bin/named/config.c
index 69b2bd54b0..631d5605d9 100644
--- a/bin/named/config.c
+++ b/bin/named/config.c
@@ -178,7 +178,13 @@ options {\n\
 	zero-no-soa-ttl-cache no;\n\
 	nsec3-test-zone no;\n\
 	allow-new-zones no;\n\
+"
+#ifdef HAVE_LMDB
+"\
 	lmdb-mapsize 32M;\n\
+"
+#endif
+"\
 	fetches-per-server 0;\n\
 	require-server-cookie no;\n\
 	v6-bias 50;\n\