diff --git a/Makefile b/Makefile
index 1e9ec42b..533aff2a 100644
--- a/Makefile
+++ b/Makefile
@@ -53,4 +53,7 @@ SOURCE_DIR = boot/zephyr
 # Needed for mbedtls config-boot.h file.
 CFLAGS += -I$(CURDIR)/boot/zephyr/include
 
+DTC_OVERLAY_FILE := $(CURDIR)/boot/zephyr/dts.overlay
+export DTC_OVERLAY_FILE
+
 include ${ZEPHYR_BASE}/Makefile.inc
diff --git a/boot/zephyr/dts.overlay b/boot/zephyr/dts.overlay
new file mode 100644
index 00000000..74d3dfbf
--- /dev/null
+++ b/boot/zephyr/dts.overlay
@@ -0,0 +1,5 @@
+/ {
+	chosen {
+		zephyr,code-partition = &boot_partition;
+	};
+};