diff --git a/java/com/google/gitiles/doc/MarkdownToHtml.java b/java/com/google/gitiles/doc/MarkdownToHtml.java
index 49a90f0..2f0f0ff 100644
--- a/java/com/google/gitiles/doc/MarkdownToHtml.java
+++ b/java/com/google/gitiles/doc/MarkdownToHtml.java
@@ -242,7 +242,7 @@
           .close("span")
           .close("a");
       // github markdown compatibility
-      if (id != id.toLowerCase()) {
+      if (!id.equals(id.toLowerCase())) {
         html.open("a")
             .attribute("class", "h")
             .attribute("name", id.toLowerCase())