diff --git a/docs/static/extra.css b/docs/static/extra.css
index c58636a2..ca38d5f2 100644
--- a/docs/static/extra.css
+++ b/docs/static/extra.css
@@ -19,4 +19,4 @@ h1 {
 .someclass { color: red; }
 
 /* Applies to the element with <... id="someid"> specified. */
-.someid { color: green; }
+#someid { color: green; }