diff --git a/config.h.in b/config.h.in
index 474b75552..9d31e765c 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
  */
 #if !defined(WINNT)
-#ident "$Id: config.h.in,v 1.6 2003/01/10 19:01:04 steve Exp $"
+#ident "$Id: config.h.in,v 1.7 2003/02/20 00:49:24 steve Exp $"
 #endif
 
 #if defined(__cplusplus)
@@ -43,10 +43,15 @@
 # undef HAVE_DL_H
 # undef HAVE_FCHMOD
 # undef HAVE_LIBREADLINE
+# undef HAVE_LIBZ
+# undef HAVE_LIBBZ2
 # undef HAVE_SYS_WAIT_H
 
 /*
  * $Log: config.h.in,v $
+ * Revision 1.7  2003/02/20 00:49:24  steve
+ *  detect -lz and -lbz2 libraries.
+ *
  * Revision 1.6  2003/01/10 19:01:04  steve
  *  Only use libiberty.h if available.
  *
diff --git a/configure.in b/configure.in
index d31f8a62b..72e575317 100644
--- a/configure.in
+++ b/configure.in
@@ -34,6 +34,9 @@ AC_LANG_CPLUSPLUS
 
 AC_CHECK_HEADERS(getopt.h malloc.h libiberty.h iosfwd sys/wait.h)
 
+AC_CHECK_LIB(z, gzwrite)
+AC_CHECK_LIB(bz2, BZ2_bzdopen)
+
 AC_MSG_CHECKING(for sys/times)
 AC_TRY_LINK(
 #include <unistd.h>