diff --git a/QUICKSTART-C.md b/QUICKSTART-C.md
index 8875e6f2..852718f2 100644
--- a/QUICKSTART-C.md
+++ b/QUICKSTART-C.md
@@ -100,6 +100,7 @@ int main(void) {
         msgpack_object_print(stdout, obj);  /*=> ["Hello", "MessagePack"] */
 
         /* cleaning */
+        msgpack_unpacked_destroy(&msg);
         msgpack_sbuffer_free(buffer);
         msgpack_packer_free(pk);
 }
@@ -139,6 +140,7 @@ int main(void) {
            /* prints the deserialized object. */
            msgpack_object obj = msg.data;
            msgpack_object_print(stdout, obj);  /*=> ["Hello", "MessagePack"] */
+           msgpack_unpacked_destroy(&msg);
            puts("");
         }
 
diff --git a/example/speed_test_uint32_array.c b/example/speed_test_uint32_array.c
index b07cd918..59e689f9 100644
--- a/example/speed_test_uint32_array.c
+++ b/example/speed_test_uint32_array.c
@@ -25,6 +25,7 @@ void test()
     while (msgpack_unpack_next(&msg, buf.data, buf.size, &upk_pos) == MSGPACK_UNPACK_SUCCESS) {
     }
 
+    msgpack_unpacked_destroy(&msg);
     msgpack_sbuffer_destroy(&buf);
 }
 
diff --git a/example/speed_test_uint64_array.c b/example/speed_test_uint64_array.c
index 88cc8222..075178c3 100644
--- a/example/speed_test_uint64_array.c
+++ b/example/speed_test_uint64_array.c
@@ -25,7 +25,7 @@ void test()
 
     while (msgpack_unpack_next(&msg, buf.data, buf.size, &upk_pos) == MSGPACK_UNPACK_SUCCESS) {
     }
-
+    msgpack_unpacked_destroy(&msg);
     msgpack_sbuffer_destroy(&buf);
 }