diff --git a/src/protocol/mod.rs b/src/protocol/mod.rs
index ebf22a0ae740cc082787d58171826616053c445e..fd1b4735baca5202d4ead0a21a34176cf8ff76c1 100644
--- a/src/protocol/mod.rs
+++ b/src/protocol/mod.rs
@@ -6,6 +6,12 @@ mod lexer;
 // mod library;
 mod parser;
 
+lazy_static::lazy_static! {
+    pub static ref TRIVIAL_PD: std::sync::Arc<ProtocolDescription> = {
+        std::sync::Arc::new(ProtocolDescription::parse(b"").unwrap())
+    };
+}
+
 use crate::common::*;
 use crate::protocol::ast::*;
 use crate::protocol::eval::*;