diff --git a/ChangeLog b/ChangeLog
index 4e7afe78e..23b1a5fb6 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,5 +1,6 @@
 2009-01-11 Dietmar Warning
- * src/spicelib/devices/hisim/hsm1eval1xx.c: using ngspice.h as a central place
+ * src/spicelib/devices/hisim/hsm1eval1xx.c, 
+   src/spicelib/devices/bsim3soi_x/b3soild.c: using ngspice.h as a central place
 
 2009-01-10 Holger Vogt
  * windisp.c: improve plot window handling, still not yet perfect
diff --git a/src/spicelib/devices/bsim3soi/b4soild.c b/src/spicelib/devices/bsim3soi/b4soild.c
index 2ba0d16d4..8f41aa642 100644
--- a/src/spicelib/devices/bsim3soi/b4soild.c
+++ b/src/spicelib/devices/bsim3soi/b4soild.c
@@ -18,10 +18,6 @@
 #include "devdefs.h"
 #include "suffix.h"
 
-#ifdef _MSC_VER
-extern int _isnan(double);
-#endif
-
 #define EPSOX 3.453133e-11
 #define EPSSI 1.03594e-10
 #define Charge_q 1.60219e-19
diff --git a/src/spicelib/devices/bsim3soi_dd/b3soiddld.c b/src/spicelib/devices/bsim3soi_dd/b3soiddld.c
index 2755bf40a..db1019bdf 100644
--- a/src/spicelib/devices/bsim3soi_dd/b3soiddld.c
+++ b/src/spicelib/devices/bsim3soi_dd/b3soiddld.c
@@ -21,10 +21,6 @@ File: b3soiddld.c          98/5/01
 #include "devdefs.h"
 #include "suffix.h"
 
-#ifdef _MSC_VER
-extern int _isnan(double);
-#endif
-
 #define MAX_EXP 5.834617425e14
 #define MIN_EXP 1.713908431e-15
 #define EXP_THRESHOLD 34.0
diff --git a/src/spicelib/devices/bsim3soi_fd/b3soifdld.c b/src/spicelib/devices/bsim3soi_fd/b3soifdld.c
index 06b97f498..cc5bbe883 100644
--- a/src/spicelib/devices/bsim3soi_fd/b3soifdld.c
+++ b/src/spicelib/devices/bsim3soi_fd/b3soifdld.c
@@ -21,10 +21,6 @@ File: b3soifdld.c          98/5/01
 #include "devdefs.h"
 #include "suffix.h"
 
-#ifdef _MSC_VER
-extern int _isnan(double);
-#endif
-
 #define MAX_EXP 5.834617425e14
 #define MIN_EXP 1.713908431e-15
 #define EXP_THRESHOLD 34.0
diff --git a/src/spicelib/devices/bsim3soi_pd/b3soipdld.c b/src/spicelib/devices/bsim3soi_pd/b3soipdld.c
index cfa7a6583..cd6a62f5b 100644
--- a/src/spicelib/devices/bsim3soi_pd/b3soipdld.c
+++ b/src/spicelib/devices/bsim3soi_pd/b3soipdld.c
@@ -26,10 +26,6 @@ Modified by Paolo Nenzi 2002
 #include "devdefs.h"
 #include "suffix.h"
 
-#ifdef _MSC_VER
-extern int _isnan(double);
-#endif
-
 #define EPSOX 3.453133e-11
 #define EPSSI 1.03594e-10
 #define Charge_q 1.60219e-19