diff --git a/app/views/layouts/public.html.haml b/app/views/layouts/public.html.haml
index 2586187..848f7d2 100644
--- a/app/views/layouts/public.html.haml
+++ b/app/views/layouts/public.html.haml
@@ -9,7 +9,7 @@
 		
 		= csrf_meta_tag 
 
-		= raw '<link rel="image_src" href="'+@thumbnail_image.to_s+'" />' if @thumbnail_image
+		= raw '<link rel="img_src" href="'+(@thumbnail_image.to_s ? @thumbnail_image : "http://blog.nicolasbally.com/front/logo.png").to_s+'" />' 
 		
 		<meta name="viewport" content="width=device-width,initial-scale=1">