diff --git a/src/maths/KLU/klusmp.c b/src/maths/KLU/klusmp.c
index 7816bfe06..1725fc8da 100644
--- a/src/maths/KLU/klusmp.c
+++ b/src/maths/KLU/klusmp.c
@@ -473,6 +473,16 @@ SMPdestroy (SMPmatrix *Matrix)
         free (Matrix->CKTdiag_CSC) ;
         free (Matrix->CKTkluAx_Complex) ;
         free (Matrix->CKTkluIntermediate_Complex) ;
+        Matrix->CKTkluNumeric = NULL ;
+        Matrix->CKTkluSymbolic = NULL ;
+        Matrix->CKTkluAp = NULL ;
+        Matrix->CKTkluAi = NULL ;
+        Matrix->CKTkluAx = NULL ;
+        Matrix->CKTkluIntermediate = NULL ;
+        Matrix->CKTbindStruct = NULL ;
+        Matrix->CKTdiag_CSC = NULL ;
+        Matrix->CKTkluAx_Complex = NULL ;
+        Matrix->CKTkluIntermediate_Complex = NULL ;
     }
 }
 
diff --git a/src/spicelib/analysis/cktsens.c b/src/spicelib/analysis/cktsens.c
index dce4be602..b24e1b2ca 100644
--- a/src/spicelib/analysis/cktsens.c
+++ b/src/spicelib/analysis/cktsens.c
@@ -375,20 +375,23 @@ int sens_sens(CKTcircuit *ckt, int restart)
 			if (error)
 				return error;
 
-//#ifdef KLU
-//                        if (ckt->CKTmatrix->CKTkluMODE)
-//                        {
-//                            /* Conversion from Real Matrix to Complex Matrix */
-//                            if (!ckt->CKTmatrix->CKTkluMatrixIsComplex)
-//                            {
-//                                for (i = 0; i < DEVmaxnum; i++)
-//                                    if (DEVices [i] && DEVices [i]->DEVbindCSCComplex && ckt->CKThead [i])
-//                                        DEVices [i]->DEVbindCSCComplex (ckt->CKThead [i], ckt);
-//
-//                                ckt->CKTmatrix->CKTkluMatrixIsComplex = CKTkluMatrixComplex;
-//                            }
-//                        }
-//#endif
+#ifdef KLU
+                        if (ckt->CKTmatrix->CKTkluMODE)
+                        {
+                            /* ReOrder */
+                            error = SMPpreOrder (ckt->CKTmatrix);
+
+                            /* Conversion from Real Matrix to Complex Matrix */
+                            if (!ckt->CKTmatrix->CKTkluMatrixIsComplex)
+                            {
+                                for (i = 0; i < DEVmaxnum; i++)
+                                    if (DEVices [i] && DEVices [i]->DEVbindCSCComplex && ckt->CKThead [i])
+                                        DEVices [i]->DEVbindCSCComplex (ckt->CKThead [i], ckt);
+
+                                ckt->CKTmatrix->CKTkluMatrixIsComplex = CKTkluMatrixComplex;
+                            }
+                        }
+#endif
 
 			error = NIacIter(ckt);
 			if (error)