diff --git a/avr/avr_lib/board-xbeeimu/avr-config.ads b/avr/avr_lib/board-xbeeimu/avr-config.ads
index b6abea8..c94ede4 100644
--- a/avr/avr_lib/board-xbeeimu/avr-config.ads
+++ b/avr/avr_lib/board-xbeeimu/avr-config.ads
@@ -1,6 +1,6 @@
 package AVR.Config is
    pragma Pure;
 
-   Clock_Frequency : constant := 10_000_000;
+   Clock_Frequency : constant := 8_000_000;
 
 end AVR.Config;