diff --git a/include/json_html_serializer.hpp b/include/json_html_serializer.hpp
index f8248c8..2382f29 100644
--- a/include/json_html_serializer.hpp
+++ b/include/json_html_serializer.hpp
@@ -397,8 +397,9 @@
     static constexpr auto d = std::numeric_limits<double>::max_digits10;
 
     // the actual conversion
-    std::ptrdiff_t len = (std::snprintf)(
-        numberbuffer.data(), numberbuffer.size(), "%.*g", d, number);
+    std::ptrdiff_t len =
+        (std::snprintf)(numberbuffer.data(), numberbuffer.size(), "%.*g", d,
+                        number);
 
     // negative value indicates an error
     if (len <= 0)