diff --git a/service/src/main/java/li/strolch/report/policy/GenericReport.java b/service/src/main/java/li/strolch/report/policy/GenericReport.java
index 2e58ef423..9c80dd3b8 100644
--- a/service/src/main/java/li/strolch/report/policy/GenericReport.java
+++ b/service/src/main/java/li/strolch/report/policy/GenericReport.java
@@ -229,7 +229,7 @@ public class GenericReport extends ReportPolicy {
 	}
 
 	@Override
-	public long getCounter() {
+	public synchronized long getCounter() {
 		return this.counter;
 	}