diag_msg: Mark dispatch table as 'const'
diff --git a/src/diag_msg.c b/src/diag_msg.c
index 20eca83..4d79b7f 100644
--- a/src/diag_msg.c
+++ b/src/diag_msg.c
@@ -177,7 +177,7 @@
 }
 
 
-struct diag_cmd_dispatch_tbl cmd_tbl[] = {
+static const struct diag_cmd_dispatch_tbl cmd_tbl[] = {
 	{ DIAG_EXT_MSG_F, diag_rx_ext_msg_f },
 	{ DIAG_QSR_EXT_MSG_TERSE_F, diag_rx_ext_msg_terse_f },
 };