diff --git a/examples/structs/structs.go b/examples/structs/structs.go
index 05abd7a..bb7c134 100644
--- a/examples/structs/structs.go
+++ b/examples/structs/structs.go
@@ -34,4 +34,8 @@ func main() {
     // pointer will be automatically dereferenced.
     sp := &s
     fmt.Println(sp.age)
+
+    // Structs are mutable.
+    sp.age = 51
+    fmt.Println(sp.age)
 }
diff --git a/examples/structs/structs.sh b/examples/structs/structs.sh
index 85385eb..6d82fa0 100644
--- a/examples/structs/structs.sh
+++ b/examples/structs/structs.sh
@@ -5,3 +5,4 @@ $ go run structs.go
 &{Ann 40}
 Sean
 50
+51