diff --git a/layouts/partials/head.html b/layouts/partials/head.html
index acbd81a..0385369 100644
--- a/layouts/partials/head.html
+++ b/layouts/partials/head.html
@@ -40,7 +40,7 @@
 <meta property="og:description" content="{{ if .IsHome }}{{ $.Site.Params.Subtitle }}{{ else }}{{ .Summary | plainify }}{{ end }}" />
 <meta property="og:url" content="{{ .Permalink }}" />
 <meta property="og:site_name" content="{{ .Title }}" />
-<meta property="og:image" content="{{ if .IsHome }}{{ $.Site.Params.favicon | absURL }}{{else}}{{ .Params.Cover | absURL }}{{ end }}">
+<meta property="og:image" content="{{ if .IsHome }}{{ $.Site.Params.favicon | absURL }}{{else}}{{ isset .Params "cover" | absURL }}{{ end }}">
 <meta property="og:image:width" content="2048">
 <meta property="og:image:height" content="1024">
 {{ range .Params.categories }}