diff --git a/ChangeLog b/ChangeLog
index 383b8584e..07b525d82 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,7 @@
+2011-05-22  Robert Larice
+ * src/spicelib/devices/hisim2/hsm2def.h :
+   hisim2, add ngspice specific GENinstance struct slot 'HSM2owner' aka `GENowner'
+
 2011-05-22  Robert Larice
  * src/spicelib/devices/hisim2/hsm2eval.c :
    hisim2, drop unused static functions (swallow warnings)
diff --git a/src/spicelib/devices/hisim2/hsm2def.h b/src/spicelib/devices/hisim2/hsm2def.h
index ad151483b..48ae74f44 100644
--- a/src/spicelib/devices/hisim2/hsm2def.h
+++ b/src/spicelib/devices/hisim2/hsm2def.h
@@ -104,6 +104,7 @@ typedef struct sHSM2instance {
   struct sHSM2instance *HSM2nextInstance;  /* pointer to next instance of 
                                               current model*/
   IFuid HSM2name; /* pointer to character string naming this instance */
+  int HSM2owner;  /* number of owner process (ngspice specific !) */
   int HSM2states; /* index into state table for this device */
 
   int HSM2dNode;      /* number of the drain node of the mosfet */