diff --git a/fmt/format.cc b/fmt/format.cc
index 719a556f..6abda6d5 100644
--- a/fmt/format.cc
+++ b/fmt/format.cc
@@ -350,7 +350,7 @@ FMT_FUNC void WindowsError::init(
     int err_code, CStringRef format_str, format_args args) {
   error_code_ = err_code;
   MemoryWriter w;
-  internal::format_windows_error(w, err_code, format(format_str, args));
+  internal::format_windows_error(w, err_code, vformat(format_str, args));
   std::runtime_error &base = *this;
   base = std::runtime_error(w.str());
 }