diff --git a/examples/twoway/introspecting_messages.lc b/examples/twoway/introspecting_messages.lc
new file mode 100644
index 0000000000000000000000000000000000000000..735cd77f01c9730b3cefed3ce3a51bcf066bf0c3
--- /dev/null
+++ b/examples/twoway/introspecting_messages.lc
@@ -0,0 +1,5 @@
+sample struct {
+  int index;
+  string name;
+  byte signature[_];
+} handles_signature;