diff --git a/config.guess b/config.guess
index 865f663de50..b7c8f5d16e8 100755
--- a/config.guess
+++ b/config.guess
@@ -684,6 +684,10 @@ EOF
        (/bin/uname -X|egrep i80486 >/dev/null) && UNAME_MACHINE=i486
        (/bin/uname -X|egrep '^Machine.*Pentium' >/dev/null) \
                && UNAME_MACHINE=i586
+       (/bin/uname -X|egrep '^Machine.*PentII' >/dev/null) \
+               && UNAME_MACHINE=i686
+       (/bin/uname -X|egrep '^Machine.*Pentium Pro' >/dev/null) \
+               && UNAME_MACHINE=i686
        echo ${UNAME_MACHINE}-${UNAME_SYSTEM}${UNAME_VERSION}-sysv${UNAME_RELEASE}
        exit 0 ;;
     i?86:*:3.2:*)
@@ -697,6 +701,8 @@ EOF
 			&& UNAME_MACHINE=i586
 		(/bin/uname -X|egrep '^Machine.*PentII' >/dev/null) \
 			&& UNAME_MACHINE=i686
+                (/bin/uname -X|egrep '^Machine.*Pentium Pro' >/dev/null) \
+                        && UNAME_MACHINE=i686
 		echo ${UNAME_MACHINE}-pc-sco$UNAME_REL
 	else
 		echo ${UNAME_MACHINE}-pc-sysv32