diff --git a/lib/isccfg/include/isccfg/grammar.h b/lib/isccfg/include/isccfg/grammar.h
index 7c234ab8c5..43947712da 100644
--- a/lib/isccfg/include/isccfg/grammar.h
+++ b/lib/isccfg/include/isccfg/grammar.h
@@ -50,9 +50,7 @@
 #define CFG_CLAUSEFLAG_NOTCONFIGURED 0x00000080
 /*% A option for a experimental feature. */
 #define CFG_CLAUSEFLAG_EXPERIMENTAL 0x00000100
-/*% A configuration option that is ineffective due to
- * compile time options, but is harmless. */
-#define CFG_CLAUSEFLAG_NOOP 0x00000200
+/* obsolete: #define CFG_CLAUSEFLAG_NOOP 0x00000200 */
 /*% Clause will be obsolete in a future release (logs a warning) */
 #define CFG_CLAUSEFLAG_DEPRECATED 0x00000400
 /*% Clause has been obsolete so long that it's now a fatal error */
diff --git a/lib/isccfg/namedconf.c b/lib/isccfg/namedconf.c
index b17b978c5c..007ede844e 100644
--- a/lib/isccfg/namedconf.c
+++ b/lib/isccfg/namedconf.c
@@ -2030,7 +2030,7 @@ static cfg_clausedef_t view_clauses[] = {
 #ifdef HAVE_LMDB
 	{ "lmdb-mapsize", &cfg_type_sizeval, 0 },
 #else  /* ifdef HAVE_LMDB */
-	{ "lmdb-mapsize", &cfg_type_sizeval, CFG_CLAUSEFLAG_NOOP },
+	{ "lmdb-mapsize", &cfg_type_sizeval, CFG_CLAUSEFLAG_NOTCONFIGURED },
 #endif /* ifdef HAVE_LMDB */
 	{ "max-acache-size", &cfg_type_sizenodefault, CFG_CLAUSEFLAG_OBSOLETE },
 	{ "max-cache-size", &cfg_type_sizeorpercent, 0 },
diff --git a/lib/isccfg/parser.c b/lib/isccfg/parser.c
index 9d13d0186e..5d9790c32d 100644
--- a/lib/isccfg/parser.c
+++ b/lib/isccfg/parser.c
@@ -2462,13 +2462,6 @@ cfg_parse_mapbody(cfg_parser_t *pctx, const cfg_type_t *type, cfg_obj_t **ret) {
 					   "should be removed ",
 					   clause->name);
 		}
-		if ((clause->flags & CFG_CLAUSEFLAG_NOOP) != 0) {
-			cfg_parser_warning(pctx, 0,
-					   "option '%s' was not "
-					   "enabled at compile time "
-					   "(ignored)",
-					   clause->name);
-		}
 
 		if ((clause->flags & CFG_CLAUSEFLAG_NOTCONFIGURED) != 0) {
 			cfg_parser_error(pctx, 0,
@@ -2719,7 +2712,6 @@ static struct flagtext {
 		  { CFG_CLAUSEFLAG_NOTCONFIGURED, "not configured" },
 		  { CFG_CLAUSEFLAG_MULTI, "may occur multiple times" },
 		  { CFG_CLAUSEFLAG_EXPERIMENTAL, "experimental" },
-		  { CFG_CLAUSEFLAG_NOOP, "non-operational" },
 		  { CFG_CLAUSEFLAG_DEPRECATED, "deprecated" },
 		  { CFG_CLAUSEFLAG_ANCIENT, "ancient" },
 		  { 0, NULL } };