diff --git a/src/spicelib/devices/bsim3/b3temp.c b/src/spicelib/devices/bsim3/b3temp.c
index 7a641d587..acf7583ee 100644
--- a/src/spicelib/devices/bsim3/b3temp.c
+++ b/src/spicelib/devices/bsim3/b3temp.c
@@ -37,7 +37,7 @@ CKTcircuit *ckt;
 {
 BSIM3model *model = (BSIM3model*) inModel;
 BSIM3instance *here;
-struct bsim3SizeDependParam *pSizeDependParamKnot, *pLastKnot, *pParam;
+struct bsim3SizeDependParam *pSizeDependParamKnot, *pLastKnot, *pParam=NULL;
 double tmp, tmp1, tmp2, tmp3, Eg, Eg0, ni, T0, T1, T2, T3, T4, T5, Ldrn, Wdrn;
 double delTemp, Temp, TRatio, Inv_L, Inv_W, Inv_LW, Vtm0, Tnom;
 double Nvtm, SourceSatCurrent, DrainSatCurrent;
diff --git a/src/spicelib/devices/bsim3soi/b4soitemp.c b/src/spicelib/devices/bsim3soi/b4soitemp.c
index d35affea3..d76909173 100644
--- a/src/spicelib/devices/bsim3soi/b4soitemp.c
+++ b/src/spicelib/devices/bsim3soi/b4soitemp.c
@@ -47,7 +47,7 @@ B4SOItemp(GENmodel *inModel, CKTcircuit *ckt)
 {
 register B4SOImodel *model = (B4SOImodel*) inModel;
 register B4SOIinstance *here;
-struct b4soiSizeDependParam *pSizeDependParamKnot, *pLastKnot, *pParam;
+struct b4soiSizeDependParam *pSizeDependParamKnot, *pLastKnot, *pParam=NULL;
 double tmp, tmp1, tmp2, Eg, Eg0, ni, T0, T1, T2, T3, T4, T5;
 double Ldrn=0.0, Wdrn;
 double Temp, TempRatio, Inv_L, Inv_W, Inv_LW, Vtm0, Tnom, TRatio;
diff --git a/src/spicelib/devices/bsim4/b4temp.c b/src/spicelib/devices/bsim4/b4temp.c
index ef6c45a03..db24b39e7 100644
--- a/src/spicelib/devices/bsim4/b4temp.c
+++ b/src/spicelib/devices/bsim4/b4temp.c
@@ -78,7 +78,7 @@ CKTcircuit *ckt;
 {
 BSIM4model *model = (BSIM4model*) inModel;
 BSIM4instance *here;
-struct bsim4SizeDependParam *pSizeDependParamKnot, *pLastKnot, *pParam;
+struct bsim4SizeDependParam *pSizeDependParamKnot, *pLastKnot, *pParam=NULL;
 double tmp, tmp1, tmp2, tmp3, Eg, Eg0, ni, epssub;
 double T0, T1, T2, T3, T4, T5, T6, T7, T8, T9, T11, Lnew=0.0, Wnew;
 double delTemp, Temp, TRatio, Inv_L, Inv_W, Inv_LW, Vtm0, Tnom;
diff --git a/src/spicelib/devices/bsim4v2/b4v2temp.c b/src/spicelib/devices/bsim4v2/b4v2temp.c
index e6427ce73..75740396a 100644
--- a/src/spicelib/devices/bsim4v2/b4v2temp.c
+++ b/src/spicelib/devices/bsim4v2/b4v2temp.c
@@ -58,7 +58,7 @@ CKTcircuit *ckt;
 {
 BSIM4v2model *model = (BSIM4v2model*) inModel;
 BSIM4v2instance *here;
-struct bsim4SizeDependParam *pSizeDependParamKnot, *pLastKnot, *pParam;
+struct bsim4SizeDependParam *pSizeDependParamKnot, *pLastKnot, *pParam=NULL;
 double tmp, tmp1, tmp2, tmp3, Eg, Eg0, ni;
 double T0, T1, T2, T3, T4, T5, T8, T9, Lnew=0.0, Wnew;
 double delTemp, Temp, TRatio, Inv_L, Inv_W, Inv_LW, Vtm0, Tnom;
diff --git a/src/spicelib/devices/bsim4v3/b4v3temp.c b/src/spicelib/devices/bsim4v3/b4v3temp.c
index 5fac3d64c..4b85a4aa8 100644
--- a/src/spicelib/devices/bsim4v3/b4v3temp.c
+++ b/src/spicelib/devices/bsim4v3/b4v3temp.c
@@ -60,7 +60,7 @@ CKTcircuit *ckt;
 {
 BSIM4v3model *model = (BSIM4v3model*) inModel;
 BSIM4v3instance *here;
-struct bsim4v3SizeDependParam *pSizeDependParamKnot, *pLastKnot, *pParam;
+struct bsim4v3SizeDependParam *pSizeDependParamKnot, *pLastKnot, *pParam=NULL;
 double tmp, tmp1, tmp2, tmp3, Eg, Eg0, ni;
 double T0, T1, T2, T3, T4, T5, T8, T9, Lnew=0.0, Wnew;
 double delTemp, Temp, TRatio, Inv_L, Inv_W, Inv_LW, Vtm0, Tnom;