diff --git a/src/maths/KLU/klu_utils.c b/src/maths/KLU/klu_utils.c
index be82f57c8..2e1ad246f 100644
--- a/src/maths/KLU/klu_utils.c
+++ b/src/maths/KLU/klu_utils.c
@@ -1,3 +1,4 @@
+#include "ngspice/memory.h"
 #include "klu_internal.h"
 
 typedef struct sElement {
@@ -104,8 +105,8 @@ KLU_convert_matrix_in_CSR         /* return TRUE if successful, FALSE otherwise
     Common->status = KLU_OK ;
 
 
-    MatrixCOO = (Element *) malloc ((size_t)nz * sizeof (Element)) ;
-    Ap_COO = (Int *) malloc ((size_t)nz * sizeof (Int)) ;
+    MatrixCOO = TMALLOC(Element, nz);
+    Ap_COO = TMALLOC(Int, nz);
 
     Az_CSC = (Entry *)Ax_CSC ;
     Az_CSR = (Entry *)Ax_CSR ;