diff --git a/src/script/script_gui.cpp b/src/script/script_gui.cpp
--- a/src/script/script_gui.cpp
+++ b/src/script/script_gui.cpp
@@ -631,6 +631,7 @@ struct ScriptTextfileWindow : public Tex
 
 	ScriptTextfileWindow(TextfileType file_type, CompanyID slot) : TextfileWindow(file_type), slot(slot)
 	{
+		this->ConstructWindow();
 		this->OnInvalidateData();
 	}