diff --git a/bin-compiler/src/main.rs b/bin-compiler/src/main.rs
index f9d1b46c4bb3f139e60139fc4f4394361433a731..9ab3e1d1bce01f4594b1f0452e1c7c71935b75c2 100644
--- a/bin-compiler/src/main.rs
+++ b/bin-compiler/src/main.rs
@@ -63,7 +63,7 @@ fn main() {
     let input_files = input_files.unwrap();
     assert!(input_files.len() > 0); // because arg is required
 
-    let mut builder = rw::ProtocolDescriptionBuilder::new();
+    let mut builder = rw::ProtocolDescriptionBuilder::new().expect("create protocol description builder");
     let mut file_buffer = Vec::with_capacity(4096);
 
     for input_file in input_files {