diff --git a/MaterialLib/SolidModels/MFront/MFront.cpp b/MaterialLib/SolidModels/MFront/MFront.cpp
index a6c15cdbcf8dc6540e8481a97f625fb01b5e0da3..b0a4371df4723dded2ee20f9801f373dcaa2f90c 100644
--- a/MaterialLib/SolidModels/MFront/MFront.cpp
+++ b/MaterialLib/SolidModels/MFront/MFront.cpp
@@ -311,7 +311,7 @@ MFront<DisplacementDim>::integrateStress(
         typename MechanicsBase<DisplacementDim>::MaterialStateVariables>
         state_upcast(state_copy.release());
 
-    return {{std::move(sigma), std::move(state_upcast), std::move(C)}};
+    return {std::make_tuple(std::move(sigma), std::move(state_upcast), std::move(C))};
 }
 
 template <int DisplacementDim>