diff --git a/scp/css/scp.css b/scp/css/scp.css
index 2cec5526cd5ca027aae0d554951031aff58cb2da..27d945a3e8cf9cf802013ebd10097462098e9078 100644
--- a/scp/css/scp.css
+++ b/scp/css/scp.css
@@ -944,7 +944,7 @@ img.avatar {
 }
 .avatar > img.avatar {
     width: 100%;
-    height: 100%;
+    height: auto;
 }
 .thread-entry .header {
     padding: 8px 0.9em;