diff --git a/projects/examples/exercises/ack.tal b/projects/examples/exercises/ack.tal
new file mode 100644
index 0000000..4d288e7
--- /dev/null
+++ b/projects/examples/exercises/ack.tal
@@ -0,0 +1,6 @@
+#02 #02 ack BRK
+
+@ack ( m n -- r )
+	OVR ?{ NIP INC JMP2r }
+	DUP ?{ INC SUB #01 !ack }
+	#0101 SUB2 OVR INC SWP ack !ack