diff --git a/bin/tests/system/serve-stale/tests.sh b/bin/tests/system/serve-stale/tests.sh
index d4a88ab396..b787c816ab 100755
--- a/bin/tests/system/serve-stale/tests.sh
+++ b/bin/tests/system/serve-stale/tests.sh
@@ -1245,7 +1245,7 @@ if [ $ret != 0 ]; then echo_i "failed"; fi
 status=$((status+ret))
 # Check that expired records are not dumped.
 ret=0
-grep "; expired (awaiting cleanup)" ns5/named_dump.db.test$n && ret=1
+grep "; expired since .* (awaiting cleanup)" ns5/named_dump.db.test$n && ret=1
 if [ $ret != 0 ]; then echo_i "failed"; fi
 status=$((status+ret))
 
@@ -1261,13 +1261,13 @@ status=$((status+ret))
 echo_i "check rndc dump expired data.example ($n)"
 ret=0
 awk '/; expired/ { x=$0; getline; print x, $0}' ns5/named_dump.db.test$n |
-    grep "; expired (awaiting cleanup) data\.example\..*A text record with a 2 second ttl" > /dev/null 2>&1 || ret=1
+    grep "; expired since .* (awaiting cleanup) data\.example\..*A text record with a 2 second ttl" > /dev/null 2>&1 || ret=1
 awk '/; expired/ { x=$0; getline; print x, $0}' ns5/named_dump.db.test$n |
-    grep "; expired (awaiting cleanup) nodata\.example\." > /dev/null 2>&1 || ret=1
+    grep "; expired since .* (awaiting cleanup) nodata\.example\." > /dev/null 2>&1 || ret=1
 awk '/; expired/ { x=$0; getline; print x, $0}' ns5/named_dump.db.test$n |
-    grep "; expired (awaiting cleanup) nxdomain\.example\." > /dev/null 2>&1 || ret=1
+    grep "; expired since .* (awaiting cleanup) nxdomain\.example\." > /dev/null 2>&1 || ret=1
 awk '/; expired/ { x=$0; getline; print x, $0}' ns5/named_dump.db.test$n |
-    grep "; expired (awaiting cleanup) othertype\.example\." > /dev/null 2>&1 || ret=1
+    grep "; expired since .* (awaiting cleanup) othertype\.example\." > /dev/null 2>&1 || ret=1
 # Also make sure the not expired data does not have an expired comment.
 awk '/; answer/ { x=$0; getline; print x, $0}' ns5/named_dump.db.test$n |
     grep "; answer longttl\.example.*A text record with a 600 second ttl" > /dev/null 2>&1 || ret=1
diff --git a/lib/dns/masterdump.c b/lib/dns/masterdump.c
index 27da0d5cb6..edd4fcaaa0 100644
--- a/lib/dns/masterdump.c
+++ b/lib/dns/masterdump.c
@@ -1114,7 +1114,15 @@ again:
 					(rds->stale_ttl -
 					 ctx->serve_stale_ttl));
 			} else if (ANCIENT(rds)) {
-				fprintf(f, "; expired (awaiting cleanup)\n");
+				isc_buffer_t b;
+				char buf[sizeof("YYYYMMDDHHMMSS")];
+				memset(buf, 0, sizeof(buf));
+				isc_buffer_init(&b, buf, sizeof(buf) - 1);
+				dns_time64_totext((uint64_t)rds->stale_ttl, &b);
+				fprintf(f,
+					"; expired since %s "
+					"(awaiting cleanup)\n",
+					buf);
 			}
 			result = dump_rdataset(mctx, name, rds, ctx, buffer, f);
 			if (result != ISC_R_SUCCESS) {
diff --git a/lib/dns/rbtdb.c b/lib/dns/rbtdb.c
index e23bab0b39..3867e96ddc 100644
--- a/lib/dns/rbtdb.c
+++ b/lib/dns/rbtdb.c
@@ -3146,7 +3146,7 @@ bind_rdataset(dns_rbtdb_t *rbtdb, dns_rbtnode_t *node, rdatasetheader_t *header,
 		rdataset->ttl = 0;
 	} else if (header->rdh_ttl < now) {
 		rdataset->attributes |= DNS_RDATASETATTR_ANCIENT;
-		rdataset->stale_ttl = 0;
+		rdataset->stale_ttl = header->rdh_ttl;
 		rdataset->ttl = 0;
 	}