diff --git a/generate/src/main.rs b/generate/src/main.rs
index aa4f6ad..43a249c 100644
--- a/generate/src/main.rs
+++ b/generate/src/main.rs
@@ -149,6 +149,19 @@ fn main() {
     }
 
     let mut out = Output::new();
+    writeln!(
+        out,
+        "// \x40generated by ../generate. To regenerate, run the following in the repo root:",
+    );
+    writeln!(out, "//");
+    writeln!(
+        out,
+        "// $ curl -LO https://www.unicode.org/Public/zipped/14.0.0/UCD.zip",
+    );
+    writeln!(out, "// $ unzip UCD.zip -d UCD");
+    writeln!(out, "// $ cargo run --manifest-path generate/Cargo.toml");
+    writeln!(out);
+
     writeln!(out, "const T: bool = true;");
     writeln!(out, "const F: bool = false;");
     writeln!(out);
diff --git a/src/tables.rs b/src/tables.rs
index 53aa5b5..a697636 100644
--- a/src/tables.rs
+++ b/src/tables.rs
@@ -1,3 +1,9 @@
+// @generated by ../generate. To regenerate, run the following in the repo root:
+//
+// $ curl -LO https://www.unicode.org/Public/zipped/14.0.0/UCD.zip
+// $ unzip UCD.zip -d UCD
+// $ cargo run --manifest-path generate/Cargo.toml
+
 const T: bool = true;
 const F: bool = false;