diff --git a/doc/api.rst b/doc/api.rst
index 9ac28724..3eb82325 100644
--- a/doc/api.rst
+++ b/doc/api.rst
@@ -313,7 +313,7 @@ The following user-defined literals are defined in ``fmt/format.h``.
 
 .. doxygenfunction:: operator""_format(const char *s, size_t n) -> detail::udl_formatter<char> 
 
-.. doxygenfunction:: operator""_a()
+.. doxygenfunction:: operator""_aconst char *s, size_t)
 
 Utilities
 ---------
diff --git a/doc/build.py b/doc/build.py
index 741f6013..f6cb5f53 100755
--- a/doc/build.py
+++ b/doc/build.py
@@ -68,7 +68,7 @@ def build_docs(version='dev', **kwargs):
                           FMT_USE_RVALUE_REFERENCES=1 \
                           FMT_USE_USER_DEFINED_LITERALS=1 \
                           FMT_USE_ALIAS_TEMPLATES=1 \
-                          FMT_USE_NONTYPE_TEMPLATE_PARAMETERS=1 \
+                          FMT_USE_NONTYPE_TEMPLATE_ARGS=1 \
                           FMT_API= \
                           "FMT_BEGIN_NAMESPACE=namespace fmt {{" \
                           "FMT_END_NAMESPACE=}}" \
diff --git a/include/fmt/xchar.h b/include/fmt/xchar.h
index ea34917f..ac0f1832 100644
--- a/include/fmt/xchar.h
+++ b/include/fmt/xchar.h
@@ -47,11 +47,6 @@ constexpr format_arg_store<wformat_context, Args...> make_wformat_args(
 }
 
 inline namespace literals {
-constexpr auto operator"" _format(const wchar_t* s, size_t n)
-    -> detail::udl_formatter<wchar_t> {
-  return {{s, n}};
-}
-
 #if FMT_USE_USER_DEFINED_LITERALS && !FMT_USE_NONTYPE_TEMPLATE_ARGS
 constexpr detail::udl_arg<wchar_t> operator"" _a(const wchar_t* s, size_t) {
   return {s};
diff --git a/test/xchar-test.cc b/test/xchar-test.cc
index 498ff651..4183b4b8 100644
--- a/test/xchar-test.cc
+++ b/test/xchar-test.cc
@@ -185,11 +185,6 @@ TEST(format_test, wide_format_to_n) {
 }
 
 #if FMT_USE_USER_DEFINED_LITERALS
-TEST(xchar_test, format_udl) {
-  using namespace fmt::literals;
-  EXPECT_EQ(L"{}c{}"_format(L"ab", 1), fmt::format(L"{}c{}", L"ab", 1));
-}
-
 TEST(xchar_test, named_arg_udl) {
   using namespace fmt::literals;
   auto udl_a =