diff --git a/src/spicelib/devices/bsim4/b4temp.c b/src/spicelib/devices/bsim4/b4temp.c
index 5e94129af..cd5b13dd9 100644
--- a/src/spicelib/devices/bsim4/b4temp.c
+++ b/src/spicelib/devices/bsim4/b4temp.c
@@ -430,8 +430,7 @@ int Size_Not_Found, i;
               Wdrn = here->BSIM4w / here->BSIM4nf;
 
               if (Size_Not_Found)
-              {   pParam = (struct bsim4SizeDependParam *)malloc(
-                            sizeof(struct bsim4SizeDependParam));
+              {   pParam = TMALLOC(struct bsim4SizeDependParam, 1);
                   if (pLastKnot == NULL)
                       model->pSizeDependParamKnot = pParam;
                   else