diff --git a/config.sub b/config.sub
index e24b850..ba9b041 100755
--- a/config.sub
+++ b/config.sub
@@ -714,7 +714,7 @@ case $os in
 	      | -ptx* | -coff* | -ecoff* | -winnt* | -domain* | -vsta* \
 	      | -udi* | -eabi* | -lites* | -ieee* | -go32* | -aux* \
 	      | -cygwin32* | -pe* | -psos* | -moss* | -proelf* | -rtems* \
-	      | -mingw32* | -linux-gnu* | -uxpv*)
+	      | -mingw32* | -linux-gnu* | -uxpv* | -beos*)
 	# Remember, each alternative MUST END IN *, to match a version number.
 		;;
 	-linux*)
@@ -827,6 +827,9 @@ case $basic_machine in
 	sparc-* | *-sun)
 		os=-sunos4.1.1
 		;;
+	*-be)
+		os=-beos
+		;;
 	*-ibm)
 		os=-aix
 		;;