diff --git a/mozilla/build/autoconf/config.guess b/mozilla/build/autoconf/config.guess
index a65c531eb98..4566b46a82a 100755
--- a/mozilla/build/autoconf/config.guess
+++ b/mozilla/build/autoconf/config.guess
@@ -541,6 +541,10 @@ EOF
 	# From seanf@swdc.stratus.com.
 	echo i860-stratus-sysv4
 	exit 0 ;;
+    *:Rhapsody:*:*)
+	test ! -z "`echo ${UNAME_MACHINE} | grep Power`" && echo ppc-apple-rhapsody${UNAME_RELEASE} && exit 0
+	echo ${UNAME_MACHINE}-apple-rhapsody${UNAME_RELEASE}
+	exit 0 ;;
     mc68*:A/UX:*:*)
 	echo m68k-apple-aux${UNAME_RELEASE}
 	exit 0 ;;
diff --git a/mozilla/build/autoconf/config.sub b/mozilla/build/autoconf/config.sub
index 9b2d7902827..3ecee013cbd 100755
--- a/mozilla/build/autoconf/config.sub
+++ b/mozilla/build/autoconf/config.sub
@@ -701,7 +701,7 @@ case $os in
 	      | -ptx* | -coff* | -ecoff* | -winnt* | -domain* | -vsta* \
 	      | -udi* | -eabi* | -lites* | -ieee* | -go32* | -aux* \
 	      | -cygwin32* | -pe* | -psos* | -moss* | -proelf* | -rtems* \
-	      | -linux* | -uxpv*)
+	      | -linux* | -uxpv* | -rhapsody*)
 	# Remember, each alternative MUST END IN *, to match a version number.
 		;;
 	-sunos5*)