diff --git a/src/spicelib/devices/hisim2/hsm2noi.c b/src/spicelib/devices/hisim2/hsm2noi.c
index 2fe59cb14..e6dde7b7d 100644
--- a/src/spicelib/devices/hisim2/hsm2noi.c
+++ b/src/spicelib/devices/hisim2/hsm2noi.c
@@ -30,9 +30,6 @@
  *    all of the MOSFET's is summed with the variable "OnDens".
  */
 
-extern void   NevalSrc();
-extern double Nintegrate();
-
 int HSM2noise (
      int mode, int operation,
      GENmodel *inModel,