diff --git a/include/behaviortree_cpp/basic_types.h b/include/behaviortree_cpp/basic_types.h
index ac3208a57..a86e31504 100644
--- a/include/behaviortree_cpp/basic_types.h
+++ b/include/behaviortree_cpp/basic_types.h
@@ -158,7 +158,7 @@ inline StringConverter GetAnyFromStringFunctor<void>()
 template<typename T> [[nodiscard]]
 std::string toStr(const T& value)
 {
-  if constexpr (std::is_convertible_v<T, std::string> or
+  if constexpr (std::is_convertible_v<T, std::string> ||
                 std::is_convertible_v<T, std::string_view>)
   {
     return value;