diff --git a/hscript/Interp.hx b/hscript/Interp.hx
index e6902eb..4715b2d 100644
--- a/hscript/Interp.hx
+++ b/hscript/Interp.hx
@@ -1473,7 +1473,7 @@ class Interp {
 			if (totalArgs == 0)
 				return null;
 			 */
-			return UnsafeReflect.callMethodUnsafe(null, field, args);
+			return UnsafeReflect.callMethodUnsafe(null, field, [o].concat(args));
 		}
 
 		usingHandler.registerEntry(name, fn, fields);