diff --git a/struct.css b/struct.css
index 74c63a2..172296b 100644
--- a/struct.css
+++ b/struct.css
@@ -120,6 +120,7 @@ main pre.lineno {
     opacity: 0.4;
     text-align: right;
     float: left;
+    clear: both;
     overflow: hidden;
 }
 main pre.lineno + pre {