diff --git a/include/nlohmann/detail/output/binary_writer.hpp b/include/nlohmann/detail/output/binary_writer.hpp
index 0f994e89a..be6a00554 100644
--- a/include/nlohmann/detail/output/binary_writer.hpp
+++ b/include/nlohmann/detail/output/binary_writer.hpp
@@ -42,7 +42,6 @@ class binary_writer
     explicit binary_writer(output_adapter_t<CharType> adapter, const bool is_bjdata_ = false) : oa(std::move(adapter)), is_bjdata(is_bjdata_)
     {
         JSON_ASSERT(oa);
-        JSON_ASSERT(is_bjdata);
     }
 
     /*!
diff --git a/single_include/nlohmann/json.hpp b/single_include/nlohmann/json.hpp
index 92b916b3d..a1da57f7d 100644
--- a/single_include/nlohmann/json.hpp
+++ b/single_include/nlohmann/json.hpp
@@ -13866,7 +13866,6 @@ class binary_writer
     explicit binary_writer(output_adapter_t<CharType> adapter, const bool is_bjdata_ = false) : oa(std::move(adapter)), is_bjdata(is_bjdata_)
     {
         JSON_ASSERT(oa);
-        JSON_ASSERT(is_bjdata);
     }
 
     /*!