1 files changed, 4 insertions, 3 deletions
diff --git a/dep/cppformat/format.h b/dep/cppformat/format.h
index fb414ca3639..0a67f3f977d 100644
--- a/dep/cppformat/format.h
+++ b/dep/cppformat/format.h
@@ -749,7 +749,7 @@ struct Arg : Value {
   Type type;
 };
 
-template <typename T>
+template <typename T = void>
 struct None {};
 
 // A helper class template to enable or disable overloads taking wide
@@ -773,9 +773,10 @@ class IsConvertibleToInt {
   typedef char no[2];
 
   static const T &get();
-  static yes &check(int);
-  static no &check(...);
 
+  static yes &check(fmt::ULongLong);
+  static no &check(...);
+  
  public:
   enum { value = (sizeof(check(get())) == sizeof(yes)) };
 };