diff --git a/modules/src/main/java/org/archive/modules/deciderules/ScriptedDecideRule.java b/modules/src/main/java/org/archive/modules/deciderules/ScriptedDecideRule.java
index f605786f..0b90bb23 100644
--- a/modules/src/main/java/org/archive/modules/deciderules/ScriptedDecideRule.java
+++ b/modules/src/main/java/org/archive/modules/deciderules/ScriptedDecideRule.java
@@ -105,7 +105,7 @@ implements ApplicationContextAware, InitializingBean {
 
     transient protected ThreadLocal<ScriptEngine> threadEngine = 
         new ThreadLocal<ScriptEngine>();
-    protected ScriptEngine sharedEngine;
+    transient protected ScriptEngine sharedEngine;
     /** map for optional use by scripts */
     public Map<Object,Object> sharedMap = new ConcurrentHashMap<Object,Object>();