diff --git a/bin/named/controlconf.c b/bin/named/controlconf.c
index 1a96565bd9..bdf347157e 100644
--- a/bin/named/controlconf.c
+++ b/bin/named/controlconf.c
@@ -489,7 +489,7 @@ control_recvmessage(isc_nmhandle_t *handle ISC_ATTR_UNUSED, isc_result_t result,
 		if ((sent + CLOCKSKEW) < conn->now ||
 		    (sent - CLOCKSKEW) > conn->now)
 		{
-			result = ISCCC_R_CLOCKSKEW;
+			result = DNS_R_CLOCKSKEW;
 			goto cleanup;
 		}
 	} else {
@@ -503,7 +503,7 @@ control_recvmessage(isc_nmhandle_t *handle ISC_ATTR_UNUSED, isc_result_t result,
 	if (isccc_cc_lookupuint32(conn->ctrl, "_exp", &exp) == ISC_R_SUCCESS &&
 	    conn->now > exp)
 	{
-		result = ISCCC_R_EXPIRED;
+		result = DNS_R_EXPIRED;
 		goto cleanup;
 	}
 
diff --git a/lib/isc/include/isc/result.h b/lib/isc/include/isc/result.h
index 734f742050..fa281b9549 100644
--- a/lib/isc/include/isc/result.h
+++ b/lib/isc/include/isc/result.h
@@ -248,10 +248,7 @@ typedef enum isc_result {
 	DNS_R_BADCOOKIE = DNS_R_NOERROR + 23,
 
 	ISCCC_R_UNKNOWNVERSION,
-	ISCCC_R_SYNTAX,
 	ISCCC_R_BADAUTH,
-	ISCCC_R_EXPIRED,
-	ISCCC_R_CLOCKSKEW,
 	ISCCC_R_DUPLICATE,
 	ISCCC_R_MAXDEPTH,
 
diff --git a/lib/isc/result.c b/lib/isc/result.c
index 298689babc..67363786a2 100644
--- a/lib/isc/result.c
+++ b/lib/isc/result.c
@@ -248,10 +248,7 @@ static const char *description[ISC_R_NRESULTS] = {
 	[DNS_R_BADCOOKIE] = "BADCOOKIE",
 
 	[ISCCC_R_UNKNOWNVERSION] = "unknown version",
-	[ISCCC_R_SYNTAX] = "syntax error",
 	[ISCCC_R_BADAUTH] = "bad auth",
-	[ISCCC_R_EXPIRED] = "expired",
-	[ISCCC_R_CLOCKSKEW] = "clock skew",
 	[ISCCC_R_DUPLICATE] = "duplicate",
 	[ISCCC_R_MAXDEPTH] = "max depth",
 };
@@ -482,10 +479,7 @@ static const char *identifier[ISC_R_NRESULTS] = {
 	[DNS_R_BADCOOKIE] = "DNS_R_BADCOOKIE",
 
 	[ISCCC_R_UNKNOWNVERSION] = "ISCCC_R_UNKNOWNVERSION",
-	[ISCCC_R_SYNTAX] = "ISCCC_R_SYNTAX",
 	[ISCCC_R_BADAUTH] = "ISCCC_R_BADAUTH",
-	[ISCCC_R_EXPIRED] = "ISCCC_R_EXPIRED",
-	[ISCCC_R_CLOCKSKEW] = "ISCCC_R_CLOCKSKEW",
 	[ISCCC_R_DUPLICATE] = "ISCCC_R_DUPLICATE",
 	[ISCCC_R_MAXDEPTH] = "ISCCC_R_MAXDEPTH",
 };
diff --git a/lib/isccc/cc.c b/lib/isccc/cc.c
index 8bb50a616d..4323a54c6b 100644
--- a/lib/isccc/cc.c
+++ b/lib/isccc/cc.c
@@ -530,7 +530,7 @@ value_fromwire(isccc_region_t *source, unsigned int depth,
 	} else if (msgtype == ISCCC_CCMSGTYPE_LIST) {
 		result = list_fromwire(&active, depth + 1, valuep);
 	} else {
-		result = ISCCC_R_SYNTAX;
+		result = DNS_R_SYNTAX;
 	}
 
 	return result;