diff --git a/java/res/layout/input_view.xml b/java/res/layout/input_view.xml
index 7bfda3a..a4bcdcc 100644
--- a/java/res/layout/input_view.xml
+++ b/java/res/layout/input_view.xml
@@ -25,7 +25,7 @@
     android:gravity="bottom|center_horizontal"
     android:orientation="vertical" >
     <!-- The height of key_preview_backing view will automatically be determined by code. -->
-    <RelativeLayout
+    <FrameLayout
         android:id="@+id/key_preview_backing"
         android:layout_width="match_parent"
         android:layout_height="0dp" />