diff --git a/res/layout/incall.xml b/res/layout/incall.xml
index ac58a3d44..895ed6b9b 100644
--- a/res/layout/incall.xml
+++ b/res/layout/incall.xml
@@ -3,7 +3,7 @@
     xmlns:tools="http://schemas.android.com/tools"
     android:id="@+id/topLayout"
     android:layout_width="match_parent"
-    android:layout_height="match_parent">
+    android:layout_height="match_parent" xmlns:app="http://schemas.android.com/apk/res/org.linphone">
     
     <FrameLayout
         android:layout_width="match_parent"
@@ -42,6 +42,7 @@
         android:layout_width="wrap_content"
         android:layout_height="match_parent"
         android:visibility="invisible"
+        android:layout_centerHorizontal="true"
         android:layout_below="@id/switchCamera"
         android:layout_marginBottom="150dp" />