diff --git a/gcc/config.guess b/gcc/config.guess
index 19066fbacc8..478c4060742 100755
--- a/gcc/config.guess
+++ b/gcc/config.guess
@@ -114,6 +114,9 @@ case "${UNAME_MACHINE}:${UNAME_SYSTEM}:${UNAME_RELEASE}:${UNAME_VERSION}" in
     VAX*:ULTRIX*:*:*)
 	echo vax-dec-ultrix${UNAME_RELEASE}
 	exit 0 ;;
+    mips:*:4*:UMIPS)
+	echo mips-mips-riscos4sysv
+	exit 0 ;;
     mips:*:5*:RISCos)
 	echo mips-mips-riscos${UNAME_RELEASE}
 	exit 0 ;;