diff --git a/interpreter/src/lib.rs b/interpreter/src/lib.rs
index d0c8036..3117ef9 100644
--- a/interpreter/src/lib.rs
+++ b/interpreter/src/lib.rs
@@ -1,3 +1,8 @@
+// This file is part of the uutils awk package.
+//
+// For the full copyright and license information, please view the LICENSE
+// files that was distributed with this source code.
+
 use color_eyre::eyre::Result;
 use either::Either;
 
diff --git a/lexer/src/lib.rs b/lexer/src/lib.rs
index 8340291..8f1748e 100644
--- a/lexer/src/lib.rs
+++ b/lexer/src/lib.rs
@@ -1,3 +1,9 @@
+// This file is part of the uutils awk package.
+//
+// For the full copyright and license information, please view the LICENSE
+// files that was distributed with this source code.
+
+
 #[cfg(test)]
 mod tests;
 
diff --git a/parser/src/ast.rs b/parser/src/ast.rs
index 9ba3523..1e5b787 100644
--- a/parser/src/ast.rs
+++ b/parser/src/ast.rs
@@ -1,3 +1,8 @@
+// This file is part of the uutils awk package.
+//
+// For the full copyright and license information, please view the LICENSE
+// files that was distributed with this source code.
+
 use std::fmt::Debug;
 
 use bumpalo::{Bump, collections::Vec};
diff --git a/parser/src/lex.rs b/parser/src/lex.rs
index a3aca13..b84cc1e 100644
--- a/parser/src/lex.rs
+++ b/parser/src/lex.rs
@@ -1,3 +1,8 @@
+// This file is part of the uutils awk package.
+//
+// For the full copyright and license information, please view the LICENSE
+// files that was distributed with this source code.
+
 use std::{fmt::Debug, iter::Peekable};
 
 use lexer::{LexingError, Logos, Span, SpannedIter, Token};
diff --git a/parser/src/lib.rs b/parser/src/lib.rs
index 776b972..bfdd55f 100644
--- a/parser/src/lib.rs
+++ b/parser/src/lib.rs
@@ -1,3 +1,8 @@
+// This file is part of the uutils awk package.
+//
+// For the full copyright and license information, please view the LICENSE
+// files that was distributed with this source code.
+
 mod ast;
 mod lex;
 mod sexpr;
diff --git a/parser/src/sexpr.rs b/parser/src/sexpr.rs
index fbcc043..85ca902 100644
--- a/parser/src/sexpr.rs
+++ b/parser/src/sexpr.rs
@@ -1,3 +1,8 @@
+// This file is part of the uutils awk package.
+//
+// For the full copyright and license information, please view the LICENSE
+// files that was distributed with this source code.
+
 use std::fmt::{Debug, Formatter, Result};
 
 use crate::ast::{Atom, Body, Expr, Identifier, Statement, Variable};
diff --git a/src/main.rs b/src/main.rs
index 586cde7..a4f723d 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -1,3 +1,8 @@
+// This file is part of the uutils awk package.
+//
+// For the full copyright and license information, please view the LICENSE
+// files that was distributed with this source code.
+
 // static POSIX: bool = false;
 
 mod utils;
diff --git a/src/utils.rs b/src/utils.rs
index 4bb770c..5735394 100644
--- a/src/utils.rs
+++ b/src/utils.rs
@@ -1,3 +1,8 @@
+// This file is part of the uutils awk package.
+//
+// For the full copyright and license information, please view the LICENSE
+// files that was distributed with this source code.
+
 use std::fmt::{Debug, Display};
 use std::panic::{UnwindSafe, catch_unwind, set_hook, take_hook};
 use std::process::exit;