diff --git a/src/autolink.c b/src/autolink.c
index dfbb9a5..f2245cb 100644
--- a/src/autolink.c
+++ b/src/autolink.c
@@ -12,9 +12,9 @@
 int
 hoedown_autolink_is_safe(const uint8_t *link, size_t link_len)
 {
-	static const size_t valid_uris_count = 5;
+	static const size_t valid_uris_count = 6;
 	static const char *valid_uris[] = {
-		"/", "http://", "https://", "ftp://", "mailto:"
+		"#", "/", "http://", "https://", "ftp://", "mailto:"
 	};
 
 	size_t i;