diff --git a/tools/update-mirrordb.tcl b/tools/update-mirrordb.tcl
index e90c93f..524f975 100755
--- a/tools/update-mirrordb.tcl
+++ b/tools/update-mirrordb.tcl
@@ -16,7 +16,7 @@ foreach var {mirror_done portfile_hash_cache portname_portfile_map} {
 
 dict for {portname status} $mirror_done {
     if {![dict exists $portname_portfile_map $portname]} {
-        ui_warn "$portname not found in portname_portfile_map"
+        puts stderr "$portname not found in portname_portfile_map"
         continue
     }
     set portfile [dict get $portname_portfile_map $portname]