diff --git a/firmware/config.mk b/firmware/config.mk
index ed92d2b..5cd2f9b 100644
--- a/firmware/config.mk
+++ b/firmware/config.mk
@@ -28,7 +28,7 @@ PROJECT_NAME		:= pico
 
 # The exact chip being built for.
 #
-TARGET_CHIP		:= SAMD20E17
+TARGET_CHIP		:= SAMD20E18
 
 # Compiliation Flags
 #