diff --git a/src/lib.rs b/src/lib.rs
index 2a736a1e..61f98dd9 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -61,6 +61,7 @@ pub fn eval_code(s: &str) -> String {
     String::from_utf8_lossy(&bytes).to_string()
 }
 
+/// The entry point for the Scryer Prolog CLI.
 pub fn run_binary() -> std::process::ExitCode {
     use crate::atom_table::Atom;
     use crate::machine::{Machine, INTERRUPT};