diff --git a/include/nlohmann/json_fwd.hpp b/include/nlohmann/json_fwd.hpp
index 7d814dafa..af3ce7a29 100644
--- a/include/nlohmann/json_fwd.hpp
+++ b/include/nlohmann/json_fwd.hpp
@@ -46,7 +46,7 @@ template<template<typename U, typename V, typename... Args> class ObjectType =
          template<typename U> class AllocatorType = std::allocator,
          template<typename T, typename SFINAE = void> class JSONSerializer =
          adl_serializer,
-         class BinaryType = std::vector<std::uint8_t>,
+         class BinaryType = std::vector<std::uint8_t>, // cppcheck-suppress syntaxError
          class CustomBaseClass = void>
 class basic_json;