diff --git a/src/maths/KLU/klusmp.c b/src/maths/KLU/klusmp.c
index 25e5af823..a641f96f5 100644
--- a/src/maths/KLU/klusmp.c
+++ b/src/maths/KLU/klusmp.c
@@ -1020,6 +1020,9 @@ SMPdestroy (SMPmatrix *Matrix)
         Matrix->SMPkluMatrix->KLUmatrixIntermediateComplex = NULL ;
         Matrix->SMPkluMatrix->KLUmatrixBindStructCOO = NULL ;
         Matrix->SMPkluMatrix->KLUmatrixTrashCOO = NULL ;
+        free (Matrix->SMPkluMatrix->KLUmatrixDiag) ;
+        free (Matrix->SMPkluMatrix->KLUmatrixCommon) ;
+        free (Matrix->SMPkluMatrix) ;
     } else {
         spDestroy (Matrix->SPmatrix) ;
     }
@@ -1051,6 +1054,9 @@ SMPdestroyKLUforCIDER (SMPmatrix *Matrix)
         Matrix->SMPkluMatrix->KLUmatrixRowCOOforCIDER = NULL ;
         Matrix->SMPkluMatrix->KLUmatrixValueComplexCOOforCIDER = NULL ;
         Matrix->SMPkluMatrix->KLUmatrixTrashCOO = NULL ;
+        free (Matrix->SMPkluMatrix->KLUmatrixDiag) ;
+        free (Matrix->SMPkluMatrix->KLUmatrixCommon) ;
+        free (Matrix->SMPkluMatrix) ;
     } else {
         spDestroy (Matrix->SPmatrix) ;
     }