diff --git a/pc-bios/Makefile b/pc-bios/Makefile
index d9f434ae5..315288df8 100644
--- a/pc-bios/Makefile
+++ b/pc-bios/Makefile
@@ -12,5 +12,8 @@ all: $(TARGETS)
 %.o: %.S
 	$(CC) $(DEFINES) -c -o $@ $<
 
+%.dtb: %.dts
+	dtc -I dts -O dtb -o $@ $<
+
 clean:
 	rm -f $(TARGETS) *.o *~