diff --git a/cpu/6502/README b/cpu/6502/README
index fbcffaeb4..20314fd05 100644
--- a/cpu/6502/README
+++ b/cpu/6502/README
@@ -16,7 +16,7 @@ configuration file (by default named contiki.cfg). It has the following format:
 
 An online Contiki configuration file generator is available at two sites:
 
-- http://www.a2retrosystems.com/contiki.htm
+- http://www.a2retrosystems.com/contiki.html
 - http://www.cbm8bit.com/contiki/