diff --git a/app/src/main/java/info/nightscout/androidaps/plugins/Common/SubscriberFragment.java b/app/src/main/java/info/nightscout/androidaps/plugins/Common/SubscriberFragment.java
index 5ca9232646..fabd83f0ea 100644
--- a/app/src/main/java/info/nightscout/androidaps/plugins/Common/SubscriberFragment.java
+++ b/app/src/main/java/info/nightscout/androidaps/plugins/Common/SubscriberFragment.java
@@ -21,7 +21,7 @@ abstract public class SubscriberFragment extends Fragment {
         updateGUI();
     }
 
-    @Override public void onDestroyView() {
+    @Override public synchronized void onDestroyView() {
         super.onDestroyView();
         if (unbinder != null)
             unbinder.unbind();