diff --git a/src/u_symlist.pas b/src/u_symlist.pas
index 610da124..5134b124 100644
--- a/src/u_symlist.pas
+++ b/src/u_symlist.pas
@@ -584,6 +584,7 @@ begin
   if fDoc = document then
     exit;
   fDoc := document;
+  TreeFilterEdit1.Text:='';
   if not Visible then
     exit;
   if fAutoRefresh then