diff --git a/MaterialLib/SolidModels/Ehlers.h b/MaterialLib/SolidModels/Ehlers.h
index a142d9601e251222c751f00f62f8f877870bcc4c..f7dc8450e41ce4b4a5399518684dd259c326e7dc 100644
--- a/MaterialLib/SolidModels/Ehlers.h
+++ b/MaterialLib/SolidModels/Ehlers.h
@@ -110,6 +110,8 @@ struct PlasticStrain final
     KelvinVector D;  ///< deviatoric plastic strain
     double V = 0;    ///< volumetric strain
     double eff = 0;  ///< effective plastic strain
+
+    EIGEN_MAKE_ALIGNED_OPERATOR_NEW;
 };
 
 class Damage final
@@ -180,6 +182,8 @@ struct StateVariables
         return os;
     }
 #endif  // NDEBUG
+
+    EIGEN_MAKE_ALIGNED_OPERATOR_NEW;
 };
 
 template <int DisplacementDim>