diff --git a/res/values/strings.xml b/res/values/strings.xml
index 9cdca4216..f80400101 100644
--- a/res/values/strings.xml
+++ b/res/values/strings.xml
@@ -18,6 +18,7 @@
     <string name="uploading_message">More witty text here!</string>
     <string name="uploading_success">Upload succeeded!</string>
     <string name="uploading_failed">Upload failed!</string>
+    <string name="authentication_failed">Authentication failed!</string>
     <string name="uploading_started">Upload started!</string>
     
 </resources>
\ No newline at end of file
diff --git a/src/org/wikimedia/commons/ShareActivity.java b/src/org/wikimedia/commons/ShareActivity.java
index 85d06db14..e966929ad 100644
--- a/src/org/wikimedia/commons/ShareActivity.java
+++ b/src/org/wikimedia/commons/ShareActivity.java
@@ -68,6 +68,18 @@ public class ShareActivity extends AuthenticatedActivity {
             }
         }
     }
+    
+    
+
+    @Override
+    protected void onAuthFailure() {
+        super.onAuthFailure();
+        Toast failureToast = Toast.makeText(this, R.string.authentication_failed, Toast.LENGTH_LONG);
+        failureToast.show();
+        finish();
+    }
+
+
 
     @Override
     public void onCreate(Bundle savedInstanceState) {