diff --git a/src/main/java/eu/siacs/conversations/ui/XmppActivity.java b/src/main/java/eu/siacs/conversations/ui/XmppActivity.java
index b6a9ae30b5854423f8e85ed6eebcff4f06e31ac7..36697e9844b23af82bd437c4b66c5bec937593fa 100644
--- a/src/main/java/eu/siacs/conversations/ui/XmppActivity.java
+++ b/src/main/java/eu/siacs/conversations/ui/XmppActivity.java
@@ -120,7 +120,8 @@ public abstract class XmppActivity extends ActionBarActivity {
     protected Toast mToast;
     public Runnable onOpenPGPKeyPublished = () -> Toast.makeText(XmppActivity.this, R.string.openpgp_has_been_published, Toast.LENGTH_SHORT).show();
     protected ConferenceInvite mPendingConferenceInvite = null;
-    protected PriorityQueue<Pair<Integer, ValueCallback<Uri[]>>> activityCallbacks = new PriorityQueue<>((x, y) -> y.first.compareTo(x.first));
+    protected PriorityQueue<Pair<Integer, ValueCallback<Uri[]>>> activityCallbacks =
+        Build.VERSION.SDK_INT >= 24 ? new PriorityQueue<>((x, y) -> y.first.compareTo(x.first)) : new PriorityQueue<>();
     protected ServiceConnection mConnection = new ServiceConnection() {
 
         @Override