diff --git a/cpu/avr/Makefile.avr b/cpu/avr/Makefile.avr
index 623879372..a98c8e44d 100644
--- a/cpu/avr/Makefile.avr
+++ b/cpu/avr/Makefile.avr
@@ -34,6 +34,10 @@ CONTIKI_TARGET_SOURCEFILES  += $(USB)
 //AVR        = clock.c mtarch.c eeprom.c flash.c leds-arch.c watchdog.c rtimer-arch.c
 endif
 
+ifdef WITH_RPL
+ CFLAGS += -DUIP_CONF_IPV6_RPL=$(WITH_RPL) 
+endif
+
 #For a coffee file system, the application makefile can define COFFEE_FILES=n
 #to select the type and COFFEE_ADDRESS=0xaaaaaaaa as the starting byte address.
 #If only one is define the other will use the (Raven webserver 1284p) defaults
diff --git a/examples/webserver-ipv6-raven/Makefile.webserver b/examples/webserver-ipv6-raven/Makefile.webserver
index 3faa39b7a..fb7f12964 100644
--- a/examples/webserver-ipv6-raven/Makefile.webserver
+++ b/examples/webserver-ipv6-raven/Makefile.webserver
@@ -4,6 +4,8 @@ all: webserver6
 APPS=raven-webserver raven-lcd-interface
 TARGET=avr-raven
 UIP_CONF_IPV6=1
+
+#WITH_RPL=1            //RPL is not yet the default.
 #RF230BB=1             //Use radio driver that communicates with the core MAC layer. Now the default.
 #COFFEE_FILES=1        //Use coffee file system in EEPROM
 #COFFEE_FILES=2        //Use coffee file system in program flash
diff --git a/examples/webserver-ipv6-raven/README b/examples/webserver-ipv6-raven/README
index ad7d725fd..50d5887d6 100644
--- a/examples/webserver-ipv6-raven/README
+++ b/examples/webserver-ipv6-raven/README
@@ -40,3 +40,15 @@ $make WEBDIR=xxx always forces regeneration of web content into httpd-fsdata.c a
 so requires PERL. A bare $make after that will not regenerate httpd-fsdata.c.
 Use $make WEBDIR=default to switch back to the default /http-fs/ content.
 
+See Makefile.webserver for optional switches for RPL or a coffee file system.
+$make WITH_RPL=1 for a RPL node, or if rpl has become the contiki default,
+$make WITH_RPL=0 to override
+
+Much headbanging can result if you do not $make clean when changing make options,
+as the normal build dependencies are bypassed and the needed object modules
+may not be rebuilt.
+
+$make connect will invoke the /tools/serial-log.pl perl script to connect to
+your serial debug port. This will log to the console and optional log file,
+adding useful time stamps. Edit the makefile for your serial port configuration.
+