diff --git a/fmt/format.h b/fmt/format.h
index 72e7c1bf3a06a..942fc3870139d 100644
--- a/fmt/format.h
+++ b/fmt/format.h
@@ -1671,7 +1671,7 @@ class ArgVisitor {
       FMT_ASSERT(false, "invalid argument type");
       break;
     case Arg::INT:
-      return FMT_DISPATCH(visit_int(arg.int_value));
+      return FMT_DISPATCH(visit_int(static_cast<char>(arg.int_value)));
     case Arg::UINT:
       return FMT_DISPATCH(visit_uint(arg.uint_value));
     case Arg::LONG_LONG:
@@ -1681,7 +1681,7 @@ class ArgVisitor {
     case Arg::BOOL:
       return FMT_DISPATCH(visit_bool(arg.int_value != 0));
     case Arg::CHAR:
-      return FMT_DISPATCH(visit_char(arg.int_value));
+      return FMT_DISPATCH(visit_char(static_cast<char>(arg.int_value)));
     case Arg::DOUBLE:
       return FMT_DISPATCH(visit_double(arg.double_value));
     case Arg::LONG_DOUBLE: