diff --git a/firmware/Makefile b/firmware/Makefile
index 167ceb1..5383780 100644
--- a/firmware/Makefile
+++ b/firmware/Makefile
@@ -1,4 +1,4 @@
-.PHONY: cpu clean
+.PHONY: cpu clean rtl_codegen
 
 DEVICETREE_GEN_DIR=.