diff --git a/src/main/java/org/olat/course/nodes/iq/IQ12EditForm.java b/src/main/java/org/olat/course/nodes/iq/IQ12EditForm.java
index 3f6d51fbbc9ef6a48088e089fdd2897468980932..2934698568a7db9b389ed5352ed5fbf7123bdfd5 100644
--- a/src/main/java/org/olat/course/nodes/iq/IQ12EditForm.java
+++ b/src/main/java/org/olat/course/nodes/iq/IQ12EditForm.java
@@ -409,6 +409,8 @@ public class IQ12EditForm extends FormBasicController {
 		endDateElement.clearError();
 		if (!endDateElement.isVisible()) endDateElement.setValue("");
 		endDateElement.setVisible(startDateElement.isVisible());
+		
+		flc.setDirty(true);
 	}