diff --git a/dG3D/src/dG3DMaterialLaw.cpp b/dG3D/src/dG3DMaterialLaw.cpp
index eba380b8d03f0d00a5c045f3ba58e838b8cc53bc..cc0f448383c0b17e3d2899dd7a52746a9d9af9b7 100644
--- a/dG3D/src/dG3DMaterialLaw.cpp
+++ b/dG3D/src/dG3DMaterialLaw.cpp
@@ -6211,14 +6211,14 @@ void StochTMDMNDG3DMaterialLaw::stress(IPVariable*ipv, const IPVariable*ipvprev,
                       for(int s=0; s<3; s++)
                         dUrot_dF(m,n,k,l) += I4_symm(m,n,p,q)*dUrot_dU(p,q,r,s)*dUdF(r,s,k,l);
             }
-        
+        /*
         for(int m=0; m<3; m++)
           for(int n=0; n<3; n++)
             for(int k=0; k<3; k++)
               for(int l=0; l<3; l++)
                 for(int p=0; p<3; p++)
-                  dFrot_dF(m,n,k,l) += R_def(m,p)*dUrot_dF(p,n,k,l);
-        // dFrot_dF = dUrot_dF; // R_def_rot = I;
+                  dFrot_dF(m,n,k,l) += R_def(m,p)*dUrot_dF(p,n,k,l);*/
+        dFrot_dF = dUrot_dF; // R_def_rot = I;
         
         for(int m=0; m<3; m++)
           for(int n=0; n<3; n++)