diff --git a/doc/syntax.rst b/doc/syntax.rst
index f6a5ff3c..af65616a 100644
--- a/doc/syntax.rst
+++ b/doc/syntax.rst
@@ -399,13 +399,15 @@ Using type-specific formatting::
    fmt::print("{:%Y-%m-%d %H:%M:%S}", t);
    // Prints: 2010-08-04 12:15:58
 
+Using the comma as a thousands separator::
+
+   #include <fmt/locale.h>
+
+   auto s = fmt::format(std::locale("en_US.UTF-8"), "{:n}", 1234567890);
+   // s == "1,234,567,890"
+
 .. ifconfig:: False
 
-   Using the comma as a thousands separator::
-
-      format("{:,}", 1234567890);
-      '1,234,567,890'
-
    Nesting arguments and more complex examples::
 
       >>> for align, text in zip('<^>', ['left', 'center', 'right']):