diff --git a/incidenceeditor-ng/incidencerecurrence.cpp b/incidenceeditor-ng/incidencerecurrence.cpp
--- a/incidenceeditor-ng/incidencerecurrence.cpp
+++ b/incidenceeditor-ng/incidencerecurrence.cpp
@@ -254,6 +254,8 @@
 {
   // clear out any old settings;
   KCalCore::Recurrence *r = incidence->recurrence();
+  const QSet<KCalCore::IncidenceBase::Field> dirtyFields(incidence->dirtyFields());
+  KCalCore::Recurrence rOld = *r;
   r->unsetRecurs(); // Why not clear() ?
 
   const RecurrenceType recurrenceType = currentRecurrenceType();
@@ -325,6 +327,10 @@
   }
 
   r->setExDates( mExceptionDates );
+
+  if (*r == rOld) {
+      incidence->setDirtyFields(dirtyFields);
+  }
 }
 
 void IncidenceRecurrence::save( const KCalCore::Incidence::Ptr &incidence )