diff --git a/modules/activiti-engine/src/main/java/org/activiti/engine/impl/db/DbSqlSession.java b/modules/activiti-engine/src/main/java/org/activiti/engine/impl/db/DbSqlSession.java
index 2dd0ae2925c3085677312c51772a45d88e2938e9..ef9057a1ca492d7e791f2473b3db6d61b947f2f0 100755
--- a/modules/activiti-engine/src/main/java/org/activiti/engine/impl/db/DbSqlSession.java
+++ b/modules/activiti-engine/src/main/java/org/activiti/engine/impl/db/DbSqlSession.java
@@ -560,10 +560,6 @@ public class DbSqlSession implements Session {
 
   // deserialized objects /////////////////////////////////////////////////////
   
-  public void addDeserializedObject(Object deserializedObject, byte[] serializedBytes, VariableInstanceEntity variableInstanceEntity) {
-    addDeserializedObject(new DeserializedObject(deserializedObject, serializedBytes, variableInstanceEntity));
-  }
-  
   public void addDeserializedObject(DeserializedObject deserializedObject) {
   	deserializedObjects.add(deserializedObject);
   }
diff --git a/modules/activiti-engine/src/main/java/org/activiti/engine/impl/variable/DeserializedObject.java b/modules/activiti-engine/src/main/java/org/activiti/engine/impl/variable/DeserializedObject.java
index 39760c16c540f6922dbd66601e81ad71588708e5..78cba5232c7a7c740f0aac3a80ee0a3b81e9ddce 100644
--- a/modules/activiti-engine/src/main/java/org/activiti/engine/impl/variable/DeserializedObject.java
+++ b/modules/activiti-engine/src/main/java/org/activiti/engine/impl/variable/DeserializedObject.java
@@ -21,12 +21,13 @@ import org.activiti.engine.impl.persistence.entity.VariableInstanceEntity;
  * @author Tom Baeyens
  */
 public class DeserializedObject {
-
+  SerializableType type;
   Object deserializedObject;
   byte[] originalBytes;
   VariableInstanceEntity variableInstanceEntity;
-  
-  public DeserializedObject(Object deserializedObject, byte[] serializedBytes, VariableInstanceEntity variableInstanceEntity) {
+
+  public DeserializedObject(SerializableType type, Object deserializedObject, byte[] serializedBytes, VariableInstanceEntity variableInstanceEntity) {
+    this.type = type;
     this.deserializedObject = deserializedObject;
     this.originalBytes = serializedBytes;
     this.variableInstanceEntity = variableInstanceEntity;
@@ -35,7 +36,7 @@ public class DeserializedObject {
   public void flush() {
     // this first check verifies if the variable value was not overwritten with another object
     if (deserializedObject==variableInstanceEntity.getCachedValue() && !variableInstanceEntity.isDeleted()) {
-      byte[] bytes = SerializableType.serialize(deserializedObject, variableInstanceEntity);
+      byte[] bytes = type.serialize(deserializedObject, variableInstanceEntity);
       if (!Arrays.equals(originalBytes, bytes)) {
         variableInstanceEntity.setBytes(bytes);
       }
diff --git a/modules/activiti-engine/src/main/java/org/activiti/engine/impl/variable/SerializableType.java b/modules/activiti-engine/src/main/java/org/activiti/engine/impl/variable/SerializableType.java
index c8ea81220136ed7f43b723b720e88661a9eed923..4ad78fbd4a10c642f54a97ebf105a8a789ed0342 100644
--- a/modules/activiti-engine/src/main/java/org/activiti/engine/impl/variable/SerializableType.java
+++ b/modules/activiti-engine/src/main/java/org/activiti/engine/impl/variable/SerializableType.java
@@ -61,9 +61,9 @@ public class SerializableType extends ByteArrayType {
 	        // so that it can be serialized again if it was changed. 
 	        Context.getCommandContext()
 	          .getDbSqlSession()
-	          .addDeserializedObject(deserializedObject, bytes, (VariableInstanceEntity) valueFields);
+	          .addDeserializedObject(new DeserializedObject(this, deserializedObject, bytes, (VariableInstanceEntity) valueFields));
 	      }
-	      
+
 	      return deserializedObject;
 	    } catch (Exception e) {
 	      throw new ActivitiException("Couldn't deserialize object in variable '"+valueFields.getName()+"'", e);
@@ -77,21 +77,21 @@ public class SerializableType extends ByteArrayType {
   public void setValue(Object value, ValueFields valueFields) {
     byte[] byteArray = serialize(value, valueFields);
     valueFields.setCachedValue(value);
-    
+
     if (valueFields.getBytes() == null) {
       // TODO why the null check? won't this cause issues when setValue is called the second this with a different object?
       if (valueFields instanceof VariableInstanceEntity) {
         // register the deserialized object for dirty checking.
         Context.getCommandContext()
           .getDbSqlSession()
-          .addDeserializedObject(valueFields.getCachedValue(), byteArray, (VariableInstanceEntity)valueFields);
+          .addDeserializedObject(new DeserializedObject(this, valueFields.getCachedValue(), byteArray, (VariableInstanceEntity)valueFields));
       }
     }
-        
+
     super.setValue(byteArray, valueFields);
   }
 
-  public static byte[] serialize(Object value, ValueFields valueFields) {
+  public byte[] serialize(Object value, ValueFields valueFields) {
     if (value == null) {
       return null;
     }
@@ -120,8 +120,8 @@ public class SerializableType extends ByteArrayType {
       }
     };
   }
-  
-  private static ObjectOutputStream createObjectOutputStream(OutputStream os) throws IOException {
+
+	protected ObjectOutputStream createObjectOutputStream(OutputStream os) throws IOException {
     return new ObjectOutputStream(os);
   }
 }