diff --git a/test/bytecode/javFiles/Matrix.jav b/test/bytecode/javFiles/Matrix.jav
index 2ba7f3071..3a4420675 100644
--- a/test/bytecode/javFiles/Matrix.jav
+++ b/test/bytecode/javFiles/Matrix.jav
@@ -18,7 +18,7 @@ public class Matrix extends Vector<Vector<Integer>> {
 	  }
     }
 
-	mul(m) {
+	mul(java.util.Vector<Vector<Integer>   m) {
         var ret = new Matrix();
         var i = 0;
         while(i < size()) {