diff --git a/src/main/java/org/olat/group/model/BusinessGroupViewImpl.java b/src/main/java/org/olat/group/model/BusinessGroupViewImpl.java
index e408b880dd02164234ee6f8b9b9062f1764d1ee9..19cb3b494ae1249009eb5a496a94dcccb9fd1f0f 100644
--- a/src/main/java/org/olat/group/model/BusinessGroupViewImpl.java
+++ b/src/main/java/org/olat/group/model/BusinessGroupViewImpl.java
@@ -79,7 +79,7 @@ public class BusinessGroupViewImpl extends PersistentObject implements BusinessG
 		return numOfParticipants;
 	}
 
-	public void setNumOfParticipants(int numOfParticipants) {
+	public void setNumOfParticipants(long numOfParticipants) {
 		this.numOfParticipants = numOfParticipants;
 	}