diff --git a/ide/exttoolside.pas b/ide/exttoolside.pas
index cfe676c396..0ee9788642 100644
--- a/ide/exttoolside.pas
+++ b/ide/exttoolside.pas
@@ -51,6 +51,7 @@ end;
 
 destructor TExternalToolIDE.Destroy;
 begin
+  Application.RemoveAllHandlersOfObject(Self);
   inherited Destroy;
 end;