diff --git a/sphinx/static/default.css b/sphinx/static/default.css
index c13f1814c..1888a7de6 100644
--- a/sphinx/static/default.css
+++ b/sphinx/static/default.css
@@ -826,6 +826,10 @@ span.eqno {
     float: right;
 }
 
+img.logo {
+    border: 0;
+}
+
 /* :::: PRINT :::: */
 @media print {
     div.document,
diff --git a/sphinx/static/sphinxdoc.css b/sphinx/static/sphinxdoc.css
index 4ac832b7e..b4bdaef26 100644
--- a/sphinx/static/sphinxdoc.css
+++ b/sphinx/static/sphinxdoc.css
@@ -514,3 +514,7 @@ div.math {
 span.eqno {
     float: right;
 }
+
+img.logo {
+    border: 0;
+}