diff --git a/openbsc/tests/bsc-nat/bsc_data.c b/openbsc/tests/bsc-nat/bsc_data.c
index 0475523..8a06348 100644
--- a/openbsc/tests/bsc-nat/bsc_data.c
+++ b/openbsc/tests/bsc-nat/bsc_data.c
@@ -96,6 +96,28 @@
 0x31
 };
 
+/* sms code msg */
+static const uint8_t smsc_rewrite[] = {
+0x00, 0x30, 0xfd, 0x06, 0x01, 0x13, 0x1e, 0x00,
+0x01, 0x29, 0x01, 0x03, 0x26, 0x09, 0x01, 0x23,
+0x00, 0x0c, 0x00, 0x07, 0x91, 0x36, 0x19, 0x08,
+0x00, 0x10, 0x50, 0x17, 0x01, 0x0c, 0x0f, 0x81,
+0x00, 0x94, 0x51, 0x87, 0x86, 0x78, 0x46, 0xf5,
+0x00, 0x00, 0x09, 0xcc, 0xb7, 0xbd, 0x0c, 0xca,
+0xbf, 0xeb, 0x20
+};
+
+static const uint8_t smsc_rewrite_patched[] = {
+0x00, 0x31, 0xfd, 0x06, 0x01, 0x13, 0x1e, 0x00,
+0x01, 0x2a, 0x01, 0x00, 0x27, 0x09, 0x01, 0x24,
+0x00, 0x0c, 0x00, 0x08, 0x91, 0x66, 0x66, 0x66,
+0x66, 0x66, 0x66, 0xf7, 0x17, 0x01, 0x0c, 0x0f,
+0x81, 0x00, 0x94, 0x51, 0x87, 0x86, 0x78, 0x46,
+0xf5, 0x00, 0x00, 0x09, 0xcc, 0xb7, 0xbd, 0x0c,
+0xca, 0xbf, 0xeb, 0x20
+};
+
+
 /*
  * MGCP messages
  */