diff --git a/src/libs/3rdparty/optional/optional.hpp b/src/libs/3rdparty/optional/optional.hpp
index 13df7c92ac2..607696d8e16 100644
--- a/src/libs/3rdparty/optional/optional.hpp
+++ b/src/libs/3rdparty/optional/optional.hpp
@@ -498,6 +498,7 @@ public:
   // 20.5.4.5, Observers
   
   explicit constexpr operator bool() const noexcept { return initialized(); }
+  constexpr bool has_value() const noexcept { return initialized(); }
   
   constexpr T const* operator ->() const {
     return TR2_OPTIONAL_ASSERTED_EXPRESSION(initialized(), dataptr());
@@ -693,7 +694,8 @@ public:
   explicit constexpr operator bool() const noexcept {
     return ref != nullptr;
   }
-  
+  constexpr bool has_value() const noexcept { return ref != nullptr; }
+
   template <class V>
   constexpr typename decay<T>::type value_or(V&& v) const
   {