diff --git a/src/main/java/org/gcube/accounting/persistence/AccountingPersistenceBackend.java b/src/main/java/org/gcube/accounting/persistence/AccountingPersistenceBackend.java
index b4de802..37c744a 100644
--- a/src/main/java/org/gcube/accounting/persistence/AccountingPersistenceBackend.java
+++ b/src/main/java/org/gcube/accounting/persistence/AccountingPersistenceBackend.java
@@ -98,8 +98,8 @@ public abstract class AccountingPersistenceBackend {
 				this.reallyAccount(usageRecord);
 				logger.debug("{} accounted succesfully from {}.", usageRecord.toString(), persistenceName);
 			} catch (Exception e) {
-				String fallabackPersistenceName = fallbackPersistence.getClass().getSimpleName();
 				try {
+					String fallabackPersistenceName = FallbackPersistenceBackend.class.getSimpleName();
 					logger.error("{} was not accounted succesfully from {}. Trying to use {}.", 
 							usageRecord.toString(), persistenceName, fallabackPersistenceName, e);
 					fallbackPersistence.reallyAccount(usageRecord);