diff --git a/src/spicelib/devices/vdmos/vdmos.c b/src/spicelib/devices/vdmos/vdmos.c
index a4c634e5d..22bb4d783 100644
--- a/src/spicelib/devices/vdmos/vdmos.c
+++ b/src/spicelib/devices/vdmos/vdmos.c
@@ -107,6 +107,12 @@ IFparm VDMOSmPTable[] = { /* model parameters */
  Xti Body diode saturation current temperature exponent
 */
 
+ /* gate-source and gate-drain capacitances */
+ IOPA("cgdmin", VDMOS_MOD_CGDMIN, IF_REAL, "Minimum non-linear G-D capacitance"),
+ IOPA("cgdmax", VDMOS_MOD_CGDMAX, IF_REAL, "Maximum non-linear G-D capacitance"),
+ IOPA("a",      VDMOS_MOD_A,      IF_REAL, "Non-linear Cgd capacitance parameter"),
+ IOPA("cgs",    VDMOS_MOD_CGS,    IF_REAL, "Gate-source capacitance"),
+
  IOP("tnom",  VDMOS_MOD_TNOM,  IF_REAL,   "Parameter measurement temperature"),
  IOP("kf",    VDMOS_MOD_KF,    IF_REAL,   "Flicker noise coefficient"),
  IOP("af",    VDMOS_MOD_AF,    IF_REAL,   "Flicker noise exponent"),
diff --git a/src/spicelib/devices/vdmos/vdmosdefs.h b/src/spicelib/devices/vdmos/vdmosdefs.h
index 5ebca172d..ef727fa13 100644
--- a/src/spicelib/devices/vdmos/vdmosdefs.h
+++ b/src/spicelib/devices/vdmos/vdmosdefs.h
@@ -309,6 +309,10 @@ typedef struct sVDMOSmodel {       /* model structure for a resistor */
     double VDMOSsurfaceMobility; /* input - use tSurfMob */
     double VDMOSfNcoef;
     double VDMOSfNexp;
+    double VDMOScgdmin;
+    double VDMOScgdmax;
+    double VDMOSa;
+    double VDMOScgs;
 
     unsigned VDMOStypeGiven  :1;
     unsigned VDMOSlatDiffGiven   :1;
@@ -342,6 +346,11 @@ typedef struct sVDMOSmodel {       /* model structure for a resistor */
     unsigned VDMOSfNcoefGiven  :1;
     unsigned VDMOSfNexpGiven   :1;
 
+    unsigned VDMOScgdminGiven   :1;
+    unsigned VDMOScgdmaxGiven   :1;
+    unsigned VDMOScgsGiven   :1;
+    unsigned VDMOSaGiven   :1;
+
 } VDMOSmodel;
 
 #ifndef NMOS
@@ -409,6 +418,10 @@ enum {
     VDMOS_MOD_AF,
     VDMOS_MOD_TYPE,
     VDMOS_MOD_DMOS,
+    VDMOS_MOD_CGDMIN,
+    VDMOS_MOD_CGDMAX,
+    VDMOS_MOD_A,
+    VDMOS_MOD_CGS,
 };
 
 /* device questions */
diff --git a/src/spicelib/devices/vdmos/vdmosmask.c b/src/spicelib/devices/vdmos/vdmosmask.c
index 071e47551..d877dea7c 100644
--- a/src/spicelib/devices/vdmos/vdmosmask.c
+++ b/src/spicelib/devices/vdmos/vdmosmask.c
@@ -54,9 +54,21 @@ VDMOSmAsk(CKTcircuit *ckt, GENmodel *inst, int which, IFvalue *value)
             else
                 value->sValue = "vdmosp";
             return(OK);
+        case VDMOS_MOD_CGDMIN:
+            value->rValue = model->VDMOScgdmin;
+            return(OK);
         case VDMOS_MOD_CBS:
             value->rValue = model->VDMOScapBS;
             return(OK);
+        case VDMOS_MOD_CGDMAX:
+            value->rValue = model->VDMOScgdmax;
+            return(OK);
+        case VDMOS_MOD_A:
+            value->rValue = model->VDMOSa;
+            return(OK);
+        case VDMOS_MOD_CGS:
+            value->rValue = model->VDMOScgs;
+            return(OK);
         case VDMOS_MOD_IS:
             value->rValue = model->VDMOSjctSatCur;
             return(OK);
diff --git a/src/spicelib/devices/vdmos/vdmosmpar.c b/src/spicelib/devices/vdmos/vdmosmpar.c
index 44636c293..e1b3a84e1 100644
--- a/src/spicelib/devices/vdmos/vdmosmpar.c
+++ b/src/spicelib/devices/vdmos/vdmosmpar.c
@@ -153,6 +153,22 @@ VDMOSmParam(int param, IFvalue *value, GENmodel *inModel)
                 model->VDMOStypeGiven = TRUE;
             }
             break;
+        case VDMOS_MOD_CGDMIN:
+            model->VDMOScgdmin = value->rValue;
+            model->VDMOScgdminGiven = TRUE;
+            break;
+        case VDMOS_MOD_CGDMAX:
+            model->VDMOScgdmax = value->rValue;
+            model->VDMOScgdmaxGiven = TRUE;
+            break;
+        case VDMOS_MOD_A:
+            model->VDMOSa = value->rValue;
+            model->VDMOSaGiven = TRUE;
+            break;
+        case VDMOS_MOD_CGS:
+            model->VDMOScgs = value->rValue;
+            model->VDMOScgsGiven = TRUE;
+            break;
         default:
             return(E_BADPARM);
     }
diff --git a/src/spicelib/devices/vdmos/vdmosset.c b/src/spicelib/devices/vdmos/vdmosset.c
index f6d3e5600..99e62f679 100644
--- a/src/spicelib/devices/vdmos/vdmosset.c
+++ b/src/spicelib/devices/vdmos/vdmosset.c
@@ -87,6 +87,18 @@ VDMOSsetup(SMPmatrix *matrix, GENmodel *inModel, CKTcircuit *ckt,
 	if(!model->VDMOSfNexpGiven) {
 	    model->VDMOSfNexp = 1;
 	}
+        if (!model->VDMOScgdminGiven) {
+            model->VDMOScgdmin = 0;
+        }
+        if (!model->VDMOScgdmaxGiven) {
+            model->VDMOScgdmax = 0;
+        }
+        if (!model->VDMOScgsGiven) {
+            model->VDMOScgs = 0;
+        }
+        if (!model->VDMOSaGiven) {
+            model->VDMOSa = 1.;
+        }
 
         /* loop through all the instances of the model */
         for (here = VDMOSinstances(model); here != NULL ;