diff --git a/ChangeLog b/ChangeLog
index 979e8ca6e..89a3e7c28 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -4,6 +4,8 @@
  - Released 1.2.1pre26
 
  - Compilation fix from Kiyokazu SUTO <suto@ks-and-ks.ne.jp>
+ - Fixed broken bugfix for /dev/ptmx on Linux systems which lack 
+   openpty(). Report from Kiyokazu SUTO <suto@ks-and-ks.ne.jp>
 
 20000115
  - Add --with-xauth-path configure directive and explicit test for
diff --git a/configure.in b/configure.in
index 816f56eb0..a5a97e7ab 100644
--- a/configure.in
+++ b/configure.in
@@ -507,7 +507,7 @@ AC_ARG_WITH(dante,
 	]
 )
 
-if test ! -z "$no_dev_ptmx" ; then
+if test -z "$no_dev_ptmx" ; then
 	AC_CHECK_FILE("/dev/ptmx", AC_DEFINE_UNQUOTED(HAVE_DEV_PTMX))
 fi
 AC_CHECK_FILE("/dev/ptc", AC_DEFINE_UNQUOTED(HAVE_DEV_PTS_AND_PTC))