diff --git a/src/spicelib/devices/vdmos/vdmosconv.c b/src/spicelib/devices/vdmos/vdmosconv.c
index 49e0ccde8..2bbed8050 100644
--- a/src/spicelib/devices/vdmos/vdmosconv.c
+++ b/src/spicelib/devices/vdmos/vdmosconv.c
@@ -32,7 +32,7 @@ VDMOSconvTest(GENmodel *inModel, CKTcircuit *ckt)
                 here = VDMOSnextInstance(here)) {
         
             vgs = model->VDMOStype * ( 
-                *(ckt->CKTrhs+here->VDMOSgNode) -
+                *(ckt->CKTrhs+here->VDMOSgNodePrime) -
                 *(ckt->CKTrhs+here->VDMOSsNodePrime));
             vds = model->VDMOStype * ( 
                 *(ckt->CKTrhs+here->VDMOSdNodePrime) -