diff --git a/Makefile b/Makefile
index ea88021..23d222e 100644
--- a/Makefile
+++ b/Makefile
@@ -26,7 +26,7 @@ BINARY = firmware
 
 # which development board is used
 # supported are: SYSTEM_BOARD, MAPLE_MINI, BLUE_PILL
-BOARD = SYSTEM_BOARD
+BOARD = BLUE_PILL
 
 # source files
 CSRC = $(wildcard *.c)