diff --git a/ChangeLog b/ChangeLog
index 17aa08fdb..bbb2a012c 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,7 @@
+2011-05-22  Robert Larice
+ * src/spicelib/devices/hisim2/* :
+   hisim2, use NG_IGNORE() (swallow warnings)
+
 2011-05-22  Robert Larice
  * src/spicelib/devices/hisim2/* :
    hisim2, remove #include "util.h"
diff --git a/src/spicelib/devices/hisim2/hsm2ask.c b/src/spicelib/devices/hisim2/hsm2ask.c
index 74231d85c..0590f6430 100644
--- a/src/spicelib/devices/hisim2/hsm2ask.c
+++ b/src/spicelib/devices/hisim2/hsm2ask.c
@@ -31,6 +31,8 @@ int HSM2ask(ckt,inst,which,value,select)
 {
   HSM2instance *here = (HSM2instance*)inst;
 
+  NG_IGNORE(select);
+
   switch (which) {
   case HSM2_L:
     value->rValue = here->HSM2_l;
diff --git a/src/spicelib/devices/hisim2/hsm2ld.c b/src/spicelib/devices/hisim2/hsm2ld.c
index 0429f7d75..65c432f63 100644
--- a/src/spicelib/devices/hisim2/hsm2ld.c
+++ b/src/spicelib/devices/hisim2/hsm2ld.c
@@ -73,6 +73,9 @@ static void ShowPhysVals(here,model,isFirst,vds,vgs,vbs,vgd,vbd,vgb)
  double vgb;
 #endif
 {
+  NG_IGNORE(vgd);
+  NG_IGNORE(vbd);
+
   /* regard the epsilon-quantity as 0.0 */
   vds = (fabs(vds) < SHOW_EPS_QUANT) ? 0.0 : vds;
   vgs = (fabs(vgs) < SHOW_EPS_QUANT) ? 0.0 : vgs;
diff --git a/src/spicelib/devices/hisim2/hsm2mask.c b/src/spicelib/devices/hisim2/hsm2mask.c
index dfe849edd..a57241894 100644
--- a/src/spicelib/devices/hisim2/hsm2mask.c
+++ b/src/spicelib/devices/hisim2/hsm2mask.c
@@ -29,6 +29,9 @@ int HSM2mAsk(ckt,inst,which,value)
      IFvalue *value;
 {
   HSM2model *model = (HSM2model *)inst;
+
+  NG_IGNORE(ckt);
+
   switch (which) {
   case HSM2_MOD_NMOS:
     value->iValue = model->HSM2_type;
diff --git a/src/spicelib/devices/hisim2/hsm2par.c b/src/spicelib/devices/hisim2/hsm2par.c
index 5c2f753c2..40e5c4d10 100644
--- a/src/spicelib/devices/hisim2/hsm2par.c
+++ b/src/spicelib/devices/hisim2/hsm2par.c
@@ -27,6 +27,9 @@ int HSM2param(param,value,inst,select)
      IFvalue *select;
 {
   HSM2instance *here = (HSM2instance*)inst;
+
+  NG_IGNORE(select);
+
   switch (param) {
   case HSM2_W:
     here->HSM2_w = value->rValue;
diff --git a/src/spicelib/devices/hisim2/hsm2pzld.c b/src/spicelib/devices/hisim2/hsm2pzld.c
index 87df775ae..a9e1b9bf4 100644
--- a/src/spicelib/devices/hisim2/hsm2pzld.c
+++ b/src/spicelib/devices/hisim2/hsm2pzld.c
@@ -41,6 +41,8 @@ int HSM2pzLoad(inModel,ckt,s)
   double gIdtotg, gIdtotd, gIdtots, gIdtotb;
   double gIstotg, gIstotd, gIstots, gIstotb;
   
+  NG_IGNORE(ckt);
+
   for ( ;model != NULL ;model = model->HSM2nextModel ) {
     for ( here = model->HSM2instances ;here!= NULL ;
 	  here = here->HSM2nextInstance ) {