diff --git a/vvp/event.cc b/vvp/event.cc
index af771e78d..a36fd15f7 100644
--- a/vvp/event.cc
+++ b/vvp/event.cc
@@ -17,7 +17,7 @@
  *    Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
  */
 #if !defined(WINNT)
-#ident "$Id: event.cc,v 1.1 2001/11/06 03:07:22 steve Exp $"
+#ident "$Id: event.cc,v 1.2 2001/11/16 04:22:27 steve Exp $"
 #endif
 
 # include  "event.h"
@@ -27,6 +27,7 @@
 
 # include  <string.h>
 # include  <assert.h>
+# include  <stdlib.h>
 #ifdef HAVE_MALLOC_H
 # include  <malloc.h>
 #endif
@@ -130,6 +131,9 @@ void compile_event(char*label, char*type,
 
 /*
  * $Log: event.cc,v $
+ * Revision 1.2  2001/11/16 04:22:27  steve
+ *  include stdlib.h for portability.
+ *
  * Revision 1.1  2001/11/06 03:07:22  steve
  *  Code rearrange. (Stephan Boettcher)
  *
diff --git a/vvp/functor.cc b/vvp/functor.cc
index 5f869e08b..183c07f1f 100644
--- a/vvp/functor.cc
+++ b/vvp/functor.cc
@@ -17,13 +17,14 @@
  *    Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
  */
 #if !defined(WINNT)
-#ident "$Id: functor.cc,v 1.33 2001/11/10 18:07:11 steve Exp $"
+#ident "$Id: functor.cc,v 1.34 2001/11/16 04:22:27 steve Exp $"
 #endif
 
 # include  "functor.h"
 # include  "debug.h"
 # include  <assert.h>
 # include  <string.h>
+# include  <stdlib.h>
 #ifdef HAVE_MALLOC_H
 # include  <malloc.h>
 #endif
@@ -168,6 +169,9 @@ edge_inputs_functor_s::~edge_inputs_functor_s()
 
 /*
  * $Log: functor.cc,v $
+ * Revision 1.34  2001/11/16 04:22:27  steve
+ *  include stdlib.h for portability.
+ *
  * Revision 1.33  2001/11/10 18:07:11  steve
  *  Runtime support for functor delays. (Stephan Boettcher)
  *
diff --git a/vvp/logic.cc b/vvp/logic.cc
index f9bfabad6..498fbcf99 100644
--- a/vvp/logic.cc
+++ b/vvp/logic.cc
@@ -17,7 +17,7 @@
  *    Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
  */
 #if !defined(WINNT)
-#ident "$Id: logic.cc,v 1.2 2001/11/07 03:34:42 steve Exp $"
+#ident "$Id: logic.cc,v 1.3 2001/11/16 04:22:27 steve Exp $"
 #endif
 
 # include  "logic.h"
@@ -27,6 +27,7 @@
 
 # include  <string.h>
 # include  <assert.h>
+# include  <stdlib.h>
 #ifdef HAVE_MALLOC_H
 # include  <malloc.h>
 #endif
@@ -136,6 +137,9 @@ void compile_functor(char*label, char*type, unsigned argc, struct symb_s*argv)
 
 /*
  * $Log: logic.cc,v $
+ * Revision 1.3  2001/11/16 04:22:27  steve
+ *  include stdlib.h for portability.
+ *
  * Revision 1.2  2001/11/07 03:34:42  steve
  *  Use functor pointers where vvp_ipoint_t is unneeded.
  *