diff --git a/MaterialLib/SolidModels/Ehlers-impl.h b/MaterialLib/SolidModels/Ehlers-impl.h
index e80b8917dc8f749fc7a20bbe4b7a7619a814a7a4..8ed21d60d473c1eb71e97ad84ccf65a99487c338 100644
--- a/MaterialLib/SolidModels/Ehlers-impl.h
+++ b/MaterialLib/SolidModels/Ehlers-impl.h
@@ -130,15 +130,6 @@ struct PhysicalStressWithInvariants final
     {
     }
 
-    PhysicalStressWithInvariants(PhysicalStressWithInvariants const&) = default;
-    PhysicalStressWithInvariants& operator=(
-        PhysicalStressWithInvariants const&) = default;
-#if defined(_MSC_VER) && (_MSC_VER >= 1900)
-    PhysicalStressWithInvariants(PhysicalStressWithInvariants&&) = default;
-    PhysicalStressWithInvariants& operator=(PhysicalStressWithInvariants&&) =
-        default;
-#endif  // _MSC_VER
-
     KelvinVector value;
     KelvinVector D;
     double I_1;