diff --git a/src/main/java/jace/apple2e/MOS65C02.java b/src/main/java/jace/apple2e/MOS65C02.java
index 9c139c8..43503fc 100644
--- a/src/main/java/jace/apple2e/MOS65C02.java
+++ b/src/main/java/jace/apple2e/MOS65C02.java
@@ -341,7 +341,7 @@ public class MOS65C02 extends CPU {
         }
     }
 
-    private static interface AddressCalculator {
+    public static interface AddressCalculator {
 
         abstract int calculateAddress(MOS65C02 cpu);