diff --git a/simple-uart-transmit/Makefile b/simple-uart-transmit/Makefile
index d9da72ed97e94c6e367e5dba0adb870ea87d92a7..5550c635fe02e665cb05ea62e97e6dfeb82c5173 100644
--- a/simple-uart-transmit/Makefile
+++ b/simple-uart-transmit/Makefile
@@ -3,4 +3,4 @@ EXTRA_CFLAGS ?= -Og -g
 
 SOURCES = main.c esp32-c3-uart-interface.c
 
-include $(MDK)/$(ARCH)/build.mk
+include ../mdk/build.mk