diff --git a/ChangeLog b/ChangeLog
index ae7eb9e..dc93d7e 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,5 +1,8 @@
 2000-02-07  Ben Elliston  <bje@redhat.com>
 
+	* config.guess: Replace sub-minor system version number with an
+	`X' on certain Cray platforms. From Keith Thompson <kst@sdsc.edu>.
+	
 	* config.sub: Add support for mmix and mmixware. From Hans-Peter
 	Nilsson <hp@bitrange.com>.
 
diff --git a/config.guess b/config.guess
index e99502a..c97b12c 100755
--- a/config.guess
+++ b/config.guess
@@ -553,10 +553,13 @@ EOF
 	      -e y/ABCDEFGHIJKLMNOPQRSTUVWXYZ/abcdefghijklmnopqrstuvwxyz/
 	exit 0 ;;
     CRAY*TS:*:*:*)
-	echo t90-cray-unicos${UNAME_RELEASE}
+	echo t90-cray-unicos${UNAME_RELEASE} | sed -e 's/\.[^.]*$/.X/'
 	exit 0 ;;
     CRAY*T3E:*:*:*)
-	echo alpha-cray-unicosmk${UNAME_RELEASE}
+	echo alpha-cray-unicosmk${UNAME_RELEASE} | sed -e 's/\.[^.]*$/.X/'
+	exit 0 ;;
+    CRAY*SV1:*:*:*)
+	echo sv1-cray-unicos${UNAME_RELEASE} | sed -e 's/\.[^.]*$/.X/'    
 	exit 0 ;;
     CRAY-2:*:*:*)
 	echo cray2-cray-unicos