diff --git a/php/utils/markdown.php b/php/utils/markdown.php
index 4611b8c..2db0550 100644
--- a/php/utils/markdown.php
+++ b/php/utils/markdown.php
@@ -274,7 +274,7 @@ class MarkdownEntity {
 	private array $props;
 
 	public function renderStart(): string {
-		global $REPOSITORY_CANONICAL_URL_FILES;
+		global $REPOSITORY_CANONICAL_URL_FILES, $SITE_CANONICAL_URL;
 
 		$type = $this->type;
 		switch ($type) {
@@ -283,6 +283,10 @@ class MarkdownEntity {
 				if (!str_starts_with($href, "#") && !str_contains($href, "://")) {
 					$href = "$REPOSITORY_CANONICAL_URL_FILES/$href";
 				}
+				remove_prefix($href, $SITE_CANONICAL_URL);
+				if (empty($href)) {
+					$href = "/";
+				}
 				return "\n<a href=\"{$href}\">";
 			default: return "\n<$type>";
 		}