diff --git a/src/spicelib/devices/bsim3soi_dd/b3soidd.c b/src/spicelib/devices/bsim3soi_dd/b3soidd.c
index e0238b6bc..9ac41c790 100644
--- a/src/spicelib/devices/bsim3soi_dd/b3soidd.c
+++ b/src/spicelib/devices/bsim3soi_dd/b3soidd.c
@@ -158,7 +158,7 @@ IOP( "isdif", B3SOIDD_MOD_ISDIF, IF_REAL, "Body to S/D injection constant"),
 IOP( "isrec", B3SOIDD_MOD_ISREC, IF_REAL, "Recombination in depletion constant"),   
 IOP( "istun", B3SOIDD_MOD_ISTUN, IF_REAL, "Tunneling diode constant"),   
 IOP( "xbjt", B3SOIDD_MOD_XBJT, IF_REAL, "Temperature coefficient for Isbjt"),   
-IOP( "xdif", B3SOIDD_MOD_XBJT, IF_REAL, "Temperature coefficient for Isdif"),   
+IOPR( "xdif",B3SOIDD_MOD_XBJT, IF_REAL, "Temperature coefficient for Isdif"),
 IOP( "xrec", B3SOIDD_MOD_XREC, IF_REAL, "Temperature coefficient for Isrec"),   
 IOP( "xtun", B3SOIDD_MOD_XTUN, IF_REAL, "Temperature coefficient for Istun"),   
 IOP( "edl", B3SOIDD_MOD_EDL, IF_REAL, "Electron diffusion length"),   
diff --git a/src/spicelib/devices/bsim3soi_fd/b3soifd.c b/src/spicelib/devices/bsim3soi_fd/b3soifd.c
index 90f8a119b..c6e3e8efb 100644
--- a/src/spicelib/devices/bsim3soi_fd/b3soifd.c
+++ b/src/spicelib/devices/bsim3soi_fd/b3soifd.c
@@ -158,7 +158,7 @@ IOP( "isdif", B3SOIFD_MOD_ISDIF, IF_REAL, "Body to S/D injection constant"),
 IOP( "isrec", B3SOIFD_MOD_ISREC, IF_REAL, "Recombination in depletion constant"),   
 IOP( "istun", B3SOIFD_MOD_ISTUN, IF_REAL, "Tunneling diode constant"),   
 IOP( "xbjt", B3SOIFD_MOD_XBJT, IF_REAL, "Temperature coefficient for Isbjt"),   
-IOP( "xdif", B3SOIFD_MOD_XBJT, IF_REAL, "Temperature coefficient for Isdif"),   
+IOPR( "xdif",B3SOIFD_MOD_XBJT, IF_REAL, "Temperature coefficient for Isdif"),
 IOP( "xrec", B3SOIFD_MOD_XREC, IF_REAL, "Temperature coefficient for Isrec"),   
 IOP( "xtun", B3SOIFD_MOD_XTUN, IF_REAL, "Temperature coefficient for Istun"),   
 IOP( "edl", B3SOIFD_MOD_EDL, IF_REAL, "Electron diffusion length"),