diff --git a/src/main/java/org/olat/group/ui/BusinessGroupFormController.java b/src/main/java/org/olat/group/ui/BusinessGroupFormController.java
index bde1bc6fb2bf047e4001f99ed5d952c00e71f994..f2b4c8a4426ef47b00d968fe2042c8a68875c203 100644
--- a/src/main/java/org/olat/group/ui/BusinessGroupFormController.java
+++ b/src/main/java/org/olat/group/ui/BusinessGroupFormController.java
@@ -215,7 +215,7 @@ public class BusinessGroupFormController extends FormBasicController {
 			Integer minimumMembers = businessGroup.getMinParticipants();
 			Integer maximumMembers = businessGroup.getMaxParticipants();
 			businessGroupMinimumMembers.setValue(minimumMembers == null || minimumMembers.intValue() <= 0 ? "" : minimumMembers.toString());
-			businessGroupMaximumMembers.setValue(maximumMembers == null || maximumMembers.intValue() <= 0 ? "" : maximumMembers.toString());
+			businessGroupMaximumMembers.setValue(maximumMembers == null || maximumMembers.intValue() < 0 ? "" : maximumMembers.toString());
 			if (businessGroup.getWaitingListEnabled() != null) {
 				enableWaitingList.select("create.form.enableWaitinglist", businessGroup.getWaitingListEnabled());
 			}