diff --git a/include/nlohmann/detail/output/binary_writer.hpp b/include/nlohmann/detail/output/binary_writer.hpp
index d536434fb..598587141 100644
--- a/include/nlohmann/detail/output/binary_writer.hpp
+++ b/include/nlohmann/detail/output/binary_writer.hpp
@@ -1127,7 +1127,7 @@ class binary_writer
         write_bson_entry_header(name, 0x05);
 
         write_number<std::int32_t, true>(static_cast<std::int32_t>(value.size()));
-        write_number(value.has_subtype() ? static_cast<std::uint8_t>(value.subtype()) : std::uint8_t(0x00));
+        write_number(value.has_subtype() ? static_cast<std::uint8_t>(value.subtype()) : static_cast<std::uint8_t>(0x00));
 
         oa->write_characters(reinterpret_cast<const CharType*>(value.data()), value.size());
     }
diff --git a/single_include/nlohmann/json.hpp b/single_include/nlohmann/json.hpp
index b9c4895f0..e2239669f 100644
--- a/single_include/nlohmann/json.hpp
+++ b/single_include/nlohmann/json.hpp
@@ -14874,7 +14874,7 @@ class binary_writer
         write_bson_entry_header(name, 0x05);
 
         write_number<std::int32_t, true>(static_cast<std::int32_t>(value.size()));
-        write_number(value.has_subtype() ? static_cast<std::uint8_t>(value.subtype()) : std::uint8_t(0x00));
+        write_number(value.has_subtype() ? static_cast<std::uint8_t>(value.subtype()) : static_cast<std::uint8_t>(0x00));
 
         oa->write_characters(reinterpret_cast<const CharType*>(value.data()), value.size());
     }