diff --git a/arm/makefile b/arm/makefile
index 13be640..6af48dd 100644
--- a/arm/makefile
+++ b/arm/makefile
@@ -81,7 +81,7 @@ test/%_tsan: | mktest
 mktest:
 	mkdir -p test
 
-test_deps = async.host.d
+test_deps = async.host.d lock.host.d fake_uart.host.d
 
 
 clean: