diff --git a/src/Factorial.jas b/src/Factorial.jas
index b2132d5..5ad0ca2 100644
--- a/src/Factorial.jas
+++ b/src/Factorial.jas
@@ -43,10 +43,11 @@
 .end method
 
 .method public static main([Ljava/lang/String;)V
-    .limit locals 1
-    .limit stack  2
-    getstatic     java/lang/System/out Ljava/io/PrintStream;
-    ldc "Hello world"
-    invokevirtual java/io/PrintStream/println(Ljava/lang/String;)V 
+    .limit locals   1
+    .limit stack    2
+    getstatic       java/lang/System/out Ljava/io/PrintStream;
+    bipush 5                                ; set parameter 1
+    invokestatic    Factorial/factorial(I)I ; call factorial
+    invokevirtual   java/io/PrintStream/println(I)V 
     return
 .end method