diff --git a/_includes/head.html b/_includes/head.html
index e75689a..6e31b6f 100644
--- a/_includes/head.html
+++ b/_includes/head.html
@@ -103,7 +103,7 @@
 
 
   <!-- Twitter summary cards -->
-  {% if shareimg != "" %}
+  {% if shareimg != "" and shareimg != site.avatar %}
   <meta name="twitter:card" content="summary_large_image">
   {% else %}
   <meta name="twitter:card" content="summary">