diff --git a/tools/layoutlib/bridge/src/com/android/layoutlib/bridge/impl/RenderSessionImpl.java b/tools/layoutlib/bridge/src/com/android/layoutlib/bridge/impl/RenderSessionImpl.java
index 0af14dd..5e3e907 100644
--- a/tools/layoutlib/bridge/src/com/android/layoutlib/bridge/impl/RenderSessionImpl.java
+++ b/tools/layoutlib/bridge/src/com/android/layoutlib/bridge/impl/RenderSessionImpl.java
@@ -183,6 +183,8 @@
         SessionParams params = getParams();
         BridgeContext context = getContext();
 
+        context.getIWindowManager().setHasNavBar(params.getHardwareConfig().hasSoftwareButtons());
+
         RenderResources resources = getParams().getResources();
         DisplayMetrics metrics = getContext().getMetrics();