--- wsrep_sst_mariabackup 2023-10-03 19:35:52.008645765 +0200
+++ wsrep_sst_mariabackup 2023-10-03 19:35:43.520780315 +0200
@@ -1189,6 +1189,12 @@ if [ "$WSREP_SST_OPT_ROLE" = 'donor' ];
         # Store donor's wsrep GTID (state ID) and wsrep_gtid_domain_id
         # (separated by a space).
         echo "$WSREP_SST_OPT_GTID $WSREP_SST_OPT_GTID_DOMAIN_ID" > "$MAGIC_FILE"
+
+        if [ -n "$WSREP_SST_OPT_REMOTE_PSWD" ]; then
+            # Let joiner know that we know its secret
+            echo "$SECRET_TAG $WSREP_SST_OPT_REMOTE_PSWD" >> "$MAGIC_FILE"
+        fi
+
         echo "1" > "$DATA/$IST_FILE"
 
         if [ -n "$scomp" ]; then