diff --git a/src/kdeclarative/private/qmlobject_p.h b/src/kdeclarative/private/qmlobject_p.h
--- a/src/kdeclarative/private/qmlobject_p.h
+++ b/src/kdeclarative/private/qmlobject_p.h
@@ -59,8 +59,15 @@
 public Q_SLOTS:
     void incubate()
     {
+        if (m_incubating) {
+            return;
+        }
+
         if (incubatingObjectCount()) {
+            m_incubating = true;
             incubateFor(m_incubation_time * 2);
+            m_incubating = false;
+
             if (incubatingObjectCount()) {
                 QCoreApplication::postEvent(this, new QEvent(QEvent::User));
             }
@@ -82,6 +89,7 @@
     }
 private:
     int m_incubation_time;
+    bool m_incubating = false;
 };
 
 }