diff --git a/lcd.mk b/lcd.mk
index 4f6116aa..670669bb 100644
--- a/lcd.mk
+++ b/lcd.mk
@@ -1,5 +1,6 @@
 # LCD files.
 LCDSRC = 	${CHIBIOS}/ext/lcd/glcd.c \
 			${CHIBIOS}/ext/fonts.c \
+			${CHIBIOS}/ext/graph.c 
 
 LCDINC = ${CHIBIOS}/ext/lcd