diff --git a/src/spicelib/devices/hisimhv2/hisimhv.h b/src/spicelib/devices/hisimhv2/hisimhv.h
index 3cff2e49b..10863759b 100644
--- a/src/spicelib/devices/hisimhv2/hisimhv.h
+++ b/src/spicelib/devices/hisimhv2/hisimhv.h
@@ -60,8 +60,8 @@ June 2008 (revised October 2011)
 #include "hsmhvdef.h"
 #include "ngspice/cktdefs.h"
 
-#ifndef _HiSIMHV_H
-#define _HiSIMHV_H
+#ifndef _HiSIMHV2_H
+#define _HiSIMHV2_H
 
 /* return value */
 #ifndef OK
@@ -137,4 +137,4 @@ extern int HSMHV2dio
  CKTcircuit   *ckt
  ) ;
 
-#endif /* _HiSIMHV_H */
+#endif /* _HiSIMHV2_H */
diff --git a/src/spicelib/devices/hisimhv2/hsmhvinit.h b/src/spicelib/devices/hisimhv2/hsmhvinit.h
index e1fdc11fe..39cbb9ee4 100644
--- a/src/spicelib/devices/hisimhv2/hsmhvinit.h
+++ b/src/spicelib/devices/hisimhv2/hsmhvinit.h
@@ -1,5 +1,5 @@
-#ifndef _HISIMINIT_H
-#define _HISIMINIT_H
+#ifndef _HSMHV2INIT_H
+#define _HSMHV2INIT_H
 
 extern IFparm HSMHV2pTable[ ];
 extern IFparm HSMHV2mPTable[ ];