diff --git a/app/src/main/java/org/ntlab/radishforandroidstudio/cactusClient/tests/SampleGame2Fragment.java b/app/src/main/java/org/ntlab/radishforandroidstudio/cactusClient/tests/SampleGame2Fragment.java
index 5c9b210..b36586c 100644
--- a/app/src/main/java/org/ntlab/radishforandroidstudio/cactusClient/tests/SampleGame2Fragment.java
+++ b/app/src/main/java/org/ntlab/radishforandroidstudio/cactusClient/tests/SampleGame2Fragment.java
@@ -1,6 +1,7 @@
 package org.ntlab.radishforandroidstudio.cactusClient.tests;
 
 import android.os.Bundle;
+import android.support.annotation.Nullable;
 import android.view.LayoutInflater;
 import android.view.MotionEvent;
 import android.view.View;
@@ -113,6 +114,7 @@
         camera.setViewLine(pocha.getDirection());
     }
 
+    @Nullable
     @Override
     public View onCreateView(LayoutInflater inflater, ViewGroup container,
                              Bundle savedInstanceState) {