diff --git a/app/src/main/java/fr/free/nrw/commons/nearby/NearbyActivity.java b/app/src/main/java/fr/free/nrw/commons/nearby/NearbyActivity.java
index 5ca0d0f33..af5a2b809 100644
--- a/app/src/main/java/fr/free/nrw/commons/nearby/NearbyActivity.java
+++ b/app/src/main/java/fr/free/nrw/commons/nearby/NearbyActivity.java
@@ -10,6 +10,7 @@ import android.net.Uri;
 import android.os.AsyncTask;
 import android.os.Build;
 import android.os.Bundle;
+import android.support.annotation.NonNull;
 import android.support.v4.app.ActivityCompat;
 import android.support.v4.app.Fragment;
 import android.support.v4.app.FragmentTransaction;
@@ -113,7 +114,7 @@ public class NearbyActivity extends NavigationBaseActivity {
     }
 
     @Override
-    public void onRequestPermissionsResult(int requestCode, String[] permissions, int[] grantResults) {
+    public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
         switch (requestCode) {
             case LOCATION_REQUEST: {
                 if (grantResults.length > 0 && grantResults[0] == PackageManager.PERMISSION_GRANTED) {