diff --git a/doc/api.rst b/doc/api.rst
index 01dd1493..49c6eea7 100644
--- a/doc/api.rst
+++ b/doc/api.rst
@@ -210,7 +210,7 @@ Utilities
 
 .. doxygenfunction:: fmt::to_wstring(const T&)
 
-.. doxygenfunction:: fmt::to_string_view(basic_string_view<Char>)
+.. doxygenfunction:: fmt::to_string_view(const basic_string<Char, Traits, Allocator>&)
 
 .. doxygenfunction:: fmt::join(const Range&, string_view)