diff --git a/acipher/ta/sub.mk b/acipher/ta/sub.mk
new file mode 100644
index 0000000..37c3c21
--- /dev/null
+++ b/acipher/ta/sub.mk
@@ -0,0 +1,2 @@
+global-incdirs-y += include
+srcs-y += acipher_ta.c