diff --git a/config.guess b/config.guess
index 453f265..fca36e0 100755
--- a/config.guess
+++ b/config.guess
@@ -1108,20 +1108,6 @@ EOF
     SM[BE]S:UNIX_SV:*:*)
 	echo mips-dde-sysv${UNAME_RELEASE}
 	exit ;;
-    RM*:ReliantUNIX-*:*:*)
-	echo mips-sni-sysv4
-	exit ;;
-    RM*:SINIX-*:*:*)
-	echo mips-sni-sysv4
-	exit ;;
-    *:SINIX-*:*:*)
-	if uname -p 2>/dev/null >/dev/null ; then
-		UNAME_MACHINE=`(uname -p) 2>/dev/null`
-		echo ${UNAME_MACHINE}-sni-sysv4
-	else
-		echo ns32k-sni-sysv
-	fi
-	exit ;;
     PENTIUM:*:4.0*:*) # Unisys `ClearPath HMP IX 4000' SVR4/MP effort
                       # says <Richard.M.Bartel@ccMail.Census.GOV>
         echo i586-unisys-sysv4
diff --git a/config.sub b/config.sub
index 3ac426d..137630d 100755
--- a/config.sub
+++ b/config.sub
@@ -1268,13 +1268,6 @@ case $os in
 	-nsk*)
 		os=-nsk
 		;;
-	# Preserve the version number of sinix5.
-	-sinix5.*)
-		os=`echo $os | sed -e 's|sinix|sysv|'`
-		;;
-	-sinix*)
-		os=-sysv4
-		;;
         -tpf*)
 		os=-tpf
 		;;