diff --git a/libraries/lib-realtime-effects/RealtimeEffectState.cpp b/libraries/lib-realtime-effects/RealtimeEffectState.cpp
index c3dd0ef..2f614dd 100644
--- a/libraries/lib-realtime-effects/RealtimeEffectState.cpp
+++ b/libraries/lib-realtime-effects/RealtimeEffectState.cpp
@@ -303,7 +303,9 @@ struct RealtimeEffectState::Access final : EffectSettingsAccess {
       if (auto pOther = dynamic_cast<const Access*>(&other)) {
          auto &mine = mwState;
          auto &theirs = pOther->mwState;
-         auto less = std::owner_less{};
+         auto less = [](const std::weak_ptr<RealtimeEffectState>& lhs, const std::weak_ptr<RealtimeEffectState>& rhs) {
+            return lhs.owner_before(rhs);
+         };
          return !(less(mine, theirs) || less(theirs, mine));
       }
       return false;