diff --git a/src/main/java/org/gcube/accounting/aggregation/AggregatedJobUsageRecord.java b/src/main/java/org/gcube/accounting/aggregation/AggregatedJobUsageRecord.java
index b21b453..1defe1c 100644
--- a/src/main/java/org/gcube/accounting/aggregation/AggregatedJobUsageRecord.java
+++ b/src/main/java/org/gcube/accounting/aggregation/AggregatedJobUsageRecord.java
@@ -36,6 +36,16 @@ public class AggregatedJobUsageRecord extends AbstractJobUsageRecord implements
 		init();
 	}
 
+	@Override
+	public int getOperationCount() {
+		return super.getOperationCount();
+	}
+	
+	@Override
+	public void setOperationCount(int operationCount) throws InvalidValueException {
+		super.setOperationCount(operationCount);
+	}
+	
 	/**
 	 * {@inheritDoc}
 	 */
diff --git a/src/main/java/org/gcube/accounting/aggregation/AggregatedPortletUsageRecord.java b/src/main/java/org/gcube/accounting/aggregation/AggregatedPortletUsageRecord.java
index 003dcb4..0656705 100644
--- a/src/main/java/org/gcube/accounting/aggregation/AggregatedPortletUsageRecord.java
+++ b/src/main/java/org/gcube/accounting/aggregation/AggregatedPortletUsageRecord.java
@@ -37,6 +37,16 @@ public class AggregatedPortletUsageRecord extends AbstractPortletUsageRecord imp
 		init();
 	}
 
+	@Override
+	public int getOperationCount() {
+		return super.getOperationCount();
+	}
+	
+	@Override
+	public void setOperationCount(int operationCount) throws InvalidValueException {
+		super.setOperationCount(operationCount);
+	}
+	
 	/**
 	 * {@inheritDoc}
 	 */
diff --git a/src/main/java/org/gcube/accounting/aggregation/AggregatedTaskUsageRecord.java b/src/main/java/org/gcube/accounting/aggregation/AggregatedTaskUsageRecord.java
index 70c0ea1..2081398 100644
--- a/src/main/java/org/gcube/accounting/aggregation/AggregatedTaskUsageRecord.java
+++ b/src/main/java/org/gcube/accounting/aggregation/AggregatedTaskUsageRecord.java
@@ -37,6 +37,16 @@ public class AggregatedTaskUsageRecord extends AbstractTaskUsageRecord implement
 		init();
 	}
 
+	@Override
+	public int getOperationCount() {
+		return super.getOperationCount();
+	}
+	
+	@Override
+	public void setOperationCount(int operationCount) throws InvalidValueException {
+		super.setOperationCount(operationCount);
+	}
+	
 	/**
 	 * {@inheritDoc}
 	 */
diff --git a/src/main/java/org/gcube/accounting/datamodel/AggregatedUsageRecord.java b/src/main/java/org/gcube/accounting/datamodel/AggregatedUsageRecord.java
index b064cb3..b16ce17 100644
--- a/src/main/java/org/gcube/accounting/datamodel/AggregatedUsageRecord.java
+++ b/src/main/java/org/gcube/accounting/datamodel/AggregatedUsageRecord.java
@@ -17,4 +17,8 @@ public interface AggregatedUsageRecord<T extends AggregatedUsageRecord<T, B>, B
 	
 	public T getAggregatedUsageRecord(B usageRecord) throws InvalidValueException ;
 	
+	public int getOperationCount();
+	
+	public void setOperationCount(int operationCount) throws InvalidValueException;
+
 }