diff --git a/src/gemini/gemini-parser.lisp b/src/gemini/gemini-parser.lisp
index ed8d376..249abd7 100644
--- a/src/gemini/gemini-parser.lisp
+++ b/src/gemini/gemini-parser.lisp
@@ -347,7 +347,7 @@
               (underlineize stream
                             (header-prefix-h2 (text-value node))
                             +h2-underline+))
-             ((html-utils:tag= :h1 node)
+             ((html-utils:tag= :h3 node)
               (underlineize stream
                             (header-prefix-h3 (text-value node))
                             +h3-underline+))