diff --git a/config.h.in b/config.h.in
index bec0b2f76..4bdc087e3 100644
--- a/config.h.in
+++ b/config.h.in
@@ -19,7 +19,7 @@
  *    Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
  */
 #ifdef HAVE_CVS_IDENT
-#ident "$Id: config.h.in,v 1.11 2004/10/04 01:10:52 steve Exp $"
+#ident "$Id: config.h.in,v 1.12 2007/02/02 04:33:00 steve Exp $"
 #endif
 
 #if defined(__cplusplus)
@@ -37,6 +37,7 @@
 # undef HAVE_TIMES
 # undef HAVE_IOSFWD
 # undef HAVE_GETOPT_H
+# undef HAVE_INTTYPES_H
 # undef HAVE_LIBIBERTY_H
 # undef HAVE_MALLOC_H
 # undef HAVE_DLFCN_H
@@ -48,8 +49,15 @@
 # undef HAVE_SYS_WAIT_H
 # undef WORDS_BIGENDIAN
 
+#ifdef HAVE_INTTYPES_H
+# include  <inttypes.h>
+#endif
+
 /*
  * $Log: config.h.in,v $
+ * Revision 1.12  2007/02/02 04:33:00  steve
+ *  Use inttypes.h instead of stdint.h for portability.
+ *
  * Revision 1.11  2004/10/04 01:10:52  steve
  *  Clean up spurious trailing white space.
  *
diff --git a/ivl_target.h b/ivl_target.h
index 8663dac21..95b7eab3f 100644
--- a/ivl_target.h
+++ b/ivl_target.h
@@ -19,10 +19,10 @@
  *    Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
  */
 #ifdef HAVE_CVS_IDENT
-#ident "$Id: ivl_target.h,v 1.175 2007/01/29 01:52:51 steve Exp $"
+#ident "$Id: ivl_target.h,v 1.176 2007/02/02 04:33:00 steve Exp $"
 #endif
 
-# include  <stdint.h>
+# include  <inttypes.h>
 
 #ifdef __cplusplus
 #define _BEGIN_DECL extern "C" {
@@ -1756,6 +1756,9 @@ _END_DECL
 
 /*
  * $Log: ivl_target.h,v $
+ * Revision 1.176  2007/02/02 04:33:00  steve
+ *  Use inttypes.h instead of stdint.h for portability.
+ *
  * Revision 1.175  2007/01/29 01:52:51  steve
  *  Clarify the use of ivl_scope_def for not-functions.
  *
diff --git a/netlist.h b/netlist.h
index c6f4a98d4..2c6e88ce8 100644
--- a/netlist.h
+++ b/netlist.h
@@ -19,7 +19,7 @@
  *    Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
  */
 #ifdef HAVE_CVS_IDENT
-#ident "$Id: netlist.h,v 1.366 2007/01/16 05:44:15 steve Exp $"
+#ident "$Id: netlist.h,v 1.367 2007/02/02 04:33:00 steve Exp $"
 #endif
 
 /*
@@ -32,8 +32,8 @@
 # include  <map>
 # include  <list>
 # include  <vector>
-# include  <stdint.h>
 # include  "ivl_target.h"
+# include  "config.h"
 # include  "verinum.h"
 # include  "verireal.h"
 # include  "StringHeap.h"
@@ -3472,6 +3472,9 @@ extern ostream& operator << (ostream&, NetNet::Type);
 
 /*
  * $Log: netlist.h,v $
+ * Revision 1.367  2007/02/02 04:33:00  steve
+ *  Use inttypes.h instead of stdint.h for portability.
+ *
  * Revision 1.366  2007/01/16 05:44:15  steve
  *  Major rework of array handling. Memories are replaced with the
  *  more general concept of arrays. The NetMemory and NetEMemory
diff --git a/verinum.h b/verinum.h
index 526c3f16c..047f110cd 100644
--- a/verinum.h
+++ b/verinum.h
@@ -19,11 +19,10 @@
  *    Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
  */
 #ifdef HAVE_CVS_IDENT
-#ident "$Id: verinum.h,v 1.32 2006/08/08 05:11:37 steve Exp $"
+#ident "$Id: verinum.h,v 1.33 2007/02/02 04:33:01 steve Exp $"
 #endif
 
 # include  <string>
-# include  <stdint.h>
 
 # include  "config.h"
 #ifdef HAVE_IOSFWD
@@ -161,6 +160,9 @@ extern verinum v_not(const verinum&left);
 
 /*
  * $Log: verinum.h,v $
+ * Revision 1.33  2007/02/02 04:33:01  steve
+ *  Use inttypes.h instead of stdint.h for portability.
+ *
  * Revision 1.32  2006/08/08 05:11:37  steve
  *  Handle 64bit delay constants.
  *
diff --git a/verireal.h b/verireal.h
index 3874f585e..159b4492f 100644
--- a/verireal.h
+++ b/verireal.h
@@ -19,17 +19,16 @@
  *    Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
  */
 #ifdef HAVE_CVS_IDENT
-#ident "$Id: verireal.h,v 1.14 2006/10/03 05:06:00 steve Exp $"
+#ident "$Id: verireal.h,v 1.15 2007/02/02 04:33:01 steve Exp $"
 #endif
 
+# include  "config.h"
 #ifdef HAVE_IOSFWD
 # include  <iosfwd>
 #else
 class ostream;
 #endif
 
-# include  <stdint.h>
-
 using namespace std;
 
 class verinum;
@@ -86,6 +85,9 @@ extern verireal operator- (const verireal&);
 
 /*
  * $Log: verireal.h,v $
+ * Revision 1.15  2007/02/02 04:33:01  steve
+ *  Use inttypes.h instead of stdint.h for portability.
+ *
  * Revision 1.14  2006/10/03 05:06:00  steve
  *  Support real valued specify delays, properly scaled.
  *
diff --git a/vvp/config.h.in b/vvp/config.h.in
index b0dedfa82..c1371f1a1 100644
--- a/vvp/config.h.in
+++ b/vvp/config.h.in
@@ -19,7 +19,7 @@
  *    Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
  */
 #ifdef HAVE_CVS_IDENT
-#ident "$Id: config.h.in,v 1.22 2006/04/27 05:04:59 steve Exp $"
+#ident "$Id: config.h.in,v 1.23 2007/02/02 04:33:01 steve Exp $"
 #endif
 
 #if defined(__cplusplus)
@@ -48,7 +48,7 @@
 # undef HAVE_LIBREADLINE
 # undef HAVE_READLINE_READLINE_H
 # undef HAVE_READLINE_HISTORY_H
-# undef HAVE_STDINT_H
+# undef HAVE_INTTYPES_H
 # undef HAVE_LROUND
 
 /* Figure if I can use readline. */
@@ -63,8 +63,8 @@
 # define MODULE_DIR "."
 #endif
 
-#ifdef HAVE_STDINT_H
-# include  <stdint.h>
+#ifdef HAVE_INTTYPES_H
+# include  <inttypes.h>
 #endif
 
 #if SIZEOF_UNSIGNED >= 8
@@ -119,6 +119,9 @@ extern long lround(double x);
 
 /*
  * $Log: config.h.in,v $
+ * Revision 1.23  2007/02/02 04:33:01  steve
+ *  Use inttypes.h instead of stdint.h for portability.
+ *
  * Revision 1.22  2006/04/27 05:04:59  steve
  *  Detect missing lround function.
  *
diff --git a/vvp/configure.in b/vvp/configure.in
index 59dc1a217..ca2062893 100644
--- a/vvp/configure.in
+++ b/vvp/configure.in
@@ -35,7 +35,7 @@ fi
 AC_PROG_INSTALL
 
 AC_LANG_CPLUSPLUS
-AC_CHECK_HEADERS(getopt.h malloc.h stdint.h iosfwd)
+AC_CHECK_HEADERS(getopt.h malloc.h inttypes.h iosfwd)
 
 AC_CHECK_SIZEOF(unsigned long long)
 AC_CHECK_SIZEOF(unsigned long)