diff --git a/doc/syntax.rst b/doc/syntax.rst
index 47c3f893..832dadca 100644
--- a/doc/syntax.rst
+++ b/doc/syntax.rst
@@ -449,7 +449,7 @@ Using type-specific formatting::
 
 Using the comma as a thousands separator::
 
-   #include <fmt/locale.h>
+   #include <fmt/format.h>
 
    auto s = fmt::format(std::locale("en_US.UTF-8"), "{:L}", 1234567890);
    // s == "1,234,567,890"