diff --git a/lib/stm32/f4/Makefile b/lib/stm32/f4/Makefile
index 3471eaaa..c25d4d13 100644
--- a/lib/stm32/f4/Makefile
+++ b/lib/stm32/f4/Makefile
@@ -54,6 +54,8 @@ OBJS            += usb.o usb_standard.o usb_control.o usb_fx07_common.o \
 
 OBJS		+= mac.o phy.o mac_stm32fxx7.o phy_ksz8051mll.o fmc.o
 
+OBJS		+= ltdc.o 
+
 VPATH += ../../usb:../:../../cm3:../common
 VPATH += ../../ethernet