diff --git a/src/spicelib/devices/adms/mextram/admsva/frontdef.inc b/src/spicelib/devices/adms/mextram/admsva/frontdef.inc
index 68f3d7bd2..184ad8982 100644
--- a/src/spicelib/devices/adms/mextram/admsva/frontdef.inc
+++ b/src/spicelib/devices/adms/mextram/admsva/frontdef.inc
@@ -39,13 +39,13 @@
 // ADMS specific definitions
 `ifdef insideADMS
     `define P(p) (*p*)
-    `define MODEL @(initial_model)
-    `define INSTANCE @(initial_instance)
+    `define INITIAL_MODEL @(initial_model)
+    `define INITIAL_INSTANCE @(initial_instance)
     `define NOISE @(noise)
 `else
     `define P(p)
-    `define MODEL
-    `define INSTANCE
+    `define INITIAL_MODEL
+    `define INITIAL_INSTANCE
     `define NOISE
 `endif
 
@@ -128,3 +128,6 @@
 `define MPIsw(nam,def,uni,        des) (*units=uni,                   desc=des*) parameter integer nam=def from[  0:  1] ;
 `define MPIty(nam,def,uni,        des) (*units=uni,                   desc=des*) parameter integer nam=def from[ -1:  1] exclude 0 ;
 
+`define IPRnb(nam,def,uni,        des) (*units=uni, type="instance",  desc=des*) parameter real    nam=def;
+`define IPRcz(nam,def,uni,        des) (*units=uni, type="instance",  desc=des*) parameter real    nam=def from[  0:inf);
+
diff --git a/src/spicelib/devices/adms/mextram/admsva/initialize.inc b/src/spicelib/devices/adms/mextram/admsva/initialize.inc
index ea7c5afa6..bbf9d75b4 100644
--- a/src/spicelib/devices/adms/mextram/admsva/initialize.inc
+++ b/src/spicelib/devices/adms/mextram/admsva/initialize.inc
@@ -9,7 +9,8 @@ else
     my_gmin = $simparam("gmin");
 
 // Initialize model constants
-
+`INITIAL_INSTANCE
+begin
 // Impact ionization constants (NPN - PNP)
 
 if (TYPE == 1) begin
@@ -85,4 +86,4 @@ inv_VGZEB_Tr = 1.0 / VGZEB_Tr;
 inv_VDE = 1.0 / VDE;
 
 // end: RvdT, November 2008; Zener tunneling current model
-
+end
\ No newline at end of file
diff --git a/src/spicelib/devices/adms/mextram/admsva/parameters.inc b/src/spicelib/devices/adms/mextram/admsva/parameters.inc
index f6660f46b..0dd13a804 100644
--- a/src/spicelib/devices/adms/mextram/admsva/parameters.inc
+++ b/src/spicelib/devices/adms/mextram/admsva/parameters.inc
@@ -6,7 +6,7 @@
 // Mextram parameters
 `MPIco( LEVEL          ,504            ,""            ,504         ,505         ,"Model level" )
 `MPRco( TREF           ,25.0           ,""            ,-273.0      ,inf         ,"Reference temperature" )
-`MPRnb( DTA            ,0.0            ,""                                      ,"Difference between the local and global ambient temperatures" )
+`IPRnb( DTA            ,0.0            ,""                                      ,"Difference between the local and global ambient temperatures" )
 `MPIcc( EXMOD          ,1              ,""            ,0           ,2           ,"Flag for extended modeling of the reverse current gain" )
 `MPIcc( EXPHI          ,1              ,""            ,0           ,1           ,"Flag for the distributed high-frequency effects in transient" )
 `MPIcc( EXAVL          ,0              ,""            ,0           ,1           ,"Flag for extended modeling of avalanche currents" )
@@ -105,7 +105,7 @@
 `MPRnb( ATH            ,0.0             ,""                                     ,"Temperature coefficient of the thermal resistance" )
 `endif
 
-`MPRoo( MULT           ,1.0             ,""            ,0.0        ,inf         ,"Multiplication factor" )
+`IPRcz( MULT           ,1.0             ,""                                     ,"Multiplication factor" )
 `MPIty( TYPE           ,1               ,""                                     ,"Flag for NPN (1) or PNP (-1) transistor type" )
 `MPRoc( GMIN           ,1.0e-13         ,""            ,0.0        ,1e-10       ,"Minimum conductance" )