diff --git a/upptst/FileSelLazyIcon/FileSelLazyIcon.upp b/upptst/FileSelLazyIcon/FileSelLazyIcon.upp
index 5c4eea115..d799c412b 100644
--- a/upptst/FileSelLazyIcon/FileSelLazyIcon.upp
+++ b/upptst/FileSelLazyIcon/FileSelLazyIcon.upp
@@ -6,5 +6,6 @@ file
 	main.cpp;
 
 mainconfig
-	"" = "GUI MT";
+	"" = "GUI",
+	"" = "GUI USEMALLOC";