diff --git a/doc/api.rst b/doc/api.rst
index e69b992f..6f790f8f 100644
--- a/doc/api.rst
+++ b/doc/api.rst
@@ -82,6 +82,8 @@ Compile-time checks are enabled by default on compilers that support C++20
 
 .. doxygenfunction:: fmt::runtime(string_view) -> runtime_format_string<>
 
+.. _udt:
+
 Formatting User-Defined Types
 -----------------------------
 
@@ -319,8 +321,6 @@ Format API
 ``fmt/format.h`` defines the full format API providing additional formatting
 functions and locale support.
 
-.. _udt:
-
 Literal-Based API
 -----------------