diff --git a/app.py b/app.py
index 879157b..a867c4c 100755
--- a/app.py
+++ b/app.py
@@ -239,8 +239,8 @@ def upload_file(over_write=1):
 @app.route("/thumb/<media>")
 @auth.login_required
 def get_thumbnail(media):
-    if media:
-        return send_file( thumbnails_folder + os.sep +  media + ".jpg", mimetype='image/jpg')
+    if media and os.path.exists(thumbnails_folder + os.sep + media):
+        return send_file(thumbnails_folder + os.sep +  media + ".jpg", mimetype='image/jpg')
     
     
 if __name__ == '__main__':