diff --git a/include/nlohmann/detail/conversions/to_json.hpp b/include/nlohmann/detail/conversions/to_json.hpp
index 0e0fb4655..aef1b1a25 100644
--- a/include/nlohmann/detail/conversions/to_json.hpp
+++ b/include/nlohmann/detail/conversions/to_json.hpp
@@ -214,10 +214,7 @@ struct external_constructor<value_t::array>
         j.m_data.m_type = value_t::array;
         j.m_data.m_value = value_t::array;
         j.m_data.m_value.array->resize(arr.size());
-        if (arr.size() > 0)
-        {
-            std::copy(std::begin(arr), std::end(arr), j.m_data.m_value.array->begin());
-        }
+        std::copy(std::begin(arr), std::end(arr), j.m_data.m_value.array->begin());
         j.set_parents();
         j.assert_invariant();
     }
diff --git a/single_include/nlohmann/json.hpp b/single_include/nlohmann/json.hpp
index dec481118..2facfbdf8 100644
--- a/single_include/nlohmann/json.hpp
+++ b/single_include/nlohmann/json.hpp
@@ -6220,10 +6220,7 @@ struct external_constructor<value_t::array>
         j.m_data.m_type = value_t::array;
         j.m_data.m_value = value_t::array;
         j.m_data.m_value.array->resize(arr.size());
-        if (arr.size() > 0)
-        {
-            std::copy(std::begin(arr), std::end(arr), j.m_data.m_value.array->begin());
-        }
+        std::copy(std::begin(arr), std::end(arr), j.m_data.m_value.array->begin());
         j.set_parents();
         j.assert_invariant();
     }