diff --git a/src/spicelib/devices/dio/dionoise.c b/src/spicelib/devices/dio/dionoise.c
index db06e3a63..b83b5d096 100644
--- a/src/spicelib/devices/dio/dionoise.c
+++ b/src/spicelib/devices/dio/dionoise.c
@@ -135,6 +135,14 @@ DIOnoise(int mode, int operation, GENmodel *genmodel, CKTcircuit *ckt,
                         noizDens[DIOTOTNOIZ] += noizDens[DIORSSWNOIZ] +
                             noizDens[DIOIDSWNOIZ] +
                             noizDens[DIOFLSWNOIZ];
+                    } else {
+                        /* no sidewall model */
+                        noizDens[DIORSSWNOIZ] = 0.0;
+                        noizDens[DIOIDSWNOIZ] = 0.0;
+                        noizDens[DIOFLSWNOIZ] = 0.0;
+                        lnNdens[DIORSSWNOIZ] = log(N_MINLOG);
+                        lnNdens[DIOIDSWNOIZ] = log(N_MINLOG);
+                        lnNdens[DIOFLSWNOIZ] = log(N_MINLOG);
                     }
 
                     lnNdens[DIOTOTNOIZ] =