diff --git a/iup/external/srcgl/vendor.go b/iup/external/srcgl/vendor.go
new file mode 100644
index 0000000..4a5fffb
--- /dev/null
+++ b/iup/external/srcgl/vendor.go
@@ -0,0 +1,3 @@
+//go:build required
+
+package vendor