diff --git a/core/src/main/java/com/google/bitcoin/core/NetworkParameters.java b/core/src/main/java/com/google/bitcoin/core/NetworkParameters.java
index f355a099..9c1d4769 100644
--- a/core/src/main/java/com/google/bitcoin/core/NetworkParameters.java
+++ b/core/src/main/java/com/google/bitcoin/core/NetworkParameters.java
@@ -113,12 +113,12 @@ public class NetworkParameters implements Serializable {
     /**
      * Returns the number of blocks between subsidy decreases
      */
-    private final int subsidyDecreaseBlockCount;
+    private /*final*/ int subsidyDecreaseBlockCount;
     
     /**
      * If we are running in testnet-in-a-box mode, we allow connections to nodes with 0 non-genesis blocks
      */
-    final boolean allowEmptyPeerChains;
+    boolean allowEmptyPeerChains;
 
     /**
      * The version codes that prefix addresses which are acceptable on this network. Although Satoshi intended these to
@@ -382,6 +382,10 @@ public class NetworkParameters implements Serializable {
         return subsidyDecreaseBlockCount;
     }
 
+    public void setSubsidyDecreaseBlockCount(int value) {
+        subsidyDecreaseBlockCount = value;
+    }
+
     /** Returns DNS names that when resolved, give IP addresses of active peers. */
     public String[] getDnsSeeds() {
         return dnsSeeds;