diff --git a/wadsrc/static/zscript/engine/base.zs b/wadsrc/static/zscript/engine/base.zs
index dd9813ae6..6b78ead56 100644
--- a/wadsrc/static/zscript/engine/base.zs
+++ b/wadsrc/static/zscript/engine/base.zs
@@ -934,3 +934,8 @@ struct QuatStruct native
 	// native double LengthSquared();
 	// native Quat Unit();
 }
+
+// this struct does not exist. It is just a type for being referenced by an opaque pointer.
+struct VMFunction native version("4.10")
+{
+}