diff --git a/ChangeLog b/ChangeLog
index 204257d9d..a6891afab 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,9 @@
+2010-10-08  Robert Larice
+ * src/include/distodef.h ,
+ * src/spicelib/devices/bjt/bjtdset.c ,
+ * src/spicelib/devices/bjt2/bjt2dset.c :
+    TanDeriv() prototype  -->  include files
+
 2010-10-08  Robert Larice
  * src/xspice/cmpp/cmpp.h ,
  * src/xspice/cmpp/main.c ,
diff --git a/src/include/distodef.h b/src/include/distodef.h
index 1e7bad10c..1eca6cc1f 100644
--- a/src/include/distodef.h
+++ b/src/include/distodef.h
@@ -210,6 +210,7 @@ extern void DivDeriv(Dderivs *, Dderivs *, Dderivs *);
 extern void PowDeriv(Dderivs *, Dderivs *, double);
 extern void AtanDeriv(Dderivs *, Dderivs *);
 extern void CosDeriv(Dderivs *, Dderivs *);
+extern void TanDeriv(Dderivs *, Dderivs *);
 extern void ExpDeriv(Dderivs *, Dderivs *);
 
 extern int CKTdisto(CKTcircuit *ckt, int mode);
diff --git a/src/spicelib/devices/bjt/bjtdset.c b/src/spicelib/devices/bjt/bjtdset.c
index f2bf9ab36..4823b5d0d 100644
--- a/src/spicelib/devices/bjt/bjtdset.c
+++ b/src/spicelib/devices/bjt/bjtdset.c
@@ -19,7 +19,7 @@ Author: 1988 Jaijeet S Roychowdhury
 
 /* actually load the current resistance value into the sparse matrix
  * previously provided */
-void TanDeriv(Dderivs *new, Dderivs *old);
+
 int BJTdSetup(GENmodel *inModel, CKTcircuit *ckt)
 {
     BJTmodel *model = (BJTmodel*)inModel;
diff --git a/src/spicelib/devices/bjt2/bjt2dset.c b/src/spicelib/devices/bjt2/bjt2dset.c
index f044c15e7..fe1109af2 100644
--- a/src/spicelib/devices/bjt2/bjt2dset.c
+++ b/src/spicelib/devices/bjt2/bjt2dset.c
@@ -17,7 +17,7 @@ Modified: Alan Gillespie
  * This function initialises the Taylor coeffs for the
  * BJT2's in the circuit
  */
-void TanDeriv(Dderivs *new, Dderivs *old);
+
 int BJT2dSetup(GENmodel *inModel, CKTcircuit *ckt)
         /* actually load the current resistance value into the 
          * sparse matrix previously provided