diff --git a/examples/listsum.lamb b/examples/listsum.lamb
new file mode 100644
index 0000000..4cb0172
--- /dev/null
+++ b/examples/listsum.lamb
@@ -0,0 +1,4 @@
+sum([]) -> 0.
+sum(x::xs) -> 1 + sum(xs).
+
+putstrln(itos(sum([1, 2, 3]))).
\ No newline at end of file