diff --git a/src/function.rs b/src/atrule/function.rs
similarity index 100%
rename from src/function.rs
rename to src/atrule/function.rs
diff --git a/src/mixin.rs b/src/atrule/mixin.rs
similarity index 100%
rename from src/mixin.rs
rename to src/atrule/mixin.rs
diff --git a/src/atrule/mod.rs b/src/atrule/mod.rs
index 3f7a0d5..339424f 100644
--- a/src/atrule/mod.rs
+++ b/src/atrule/mod.rs
@@ -3,10 +3,10 @@ use std::iter::Peekable;
 
 use num_traits::cast::ToPrimitive;
 
+pub(crate) use function::Function;
+pub(crate) use mixin::{eat_include, Mixin};
 use crate::common::{Keyword, Pos, Symbol};
 use crate::error::SassResult;
-use crate::function::Function;
-use crate::mixin::Mixin;
 use crate::scope::Scope;
 use crate::selector::Selector;
 use crate::unit::Unit;
@@ -17,7 +17,9 @@ use crate::{Stmt, Token, TokenKind};
 use parse::eat_stmts;
 use unknown::UnknownAtRule;
 
+mod function;
 mod parse;
+mod mixin;
 mod unknown;
 
 #[derive(Debug, Clone)]
diff --git a/src/lib.rs b/src/lib.rs
index e0b566c..65e5e62 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -84,16 +84,14 @@ use std::io::Write;
 use std::iter::{Iterator, Peekable};
 use std::path::Path;
 
-use crate::atrule::{AtRule, AtRuleKind};
+use crate::atrule::{AtRule, AtRuleKind, eat_include, Mixin, Function};
 use crate::common::{Pos, Symbol, Whitespace};
 use crate::css::Css;
 use crate::error::SassError;
 pub use crate::error::SassResult;
 use crate::format::PrettyPrinter;
-use crate::function::Function;
 use crate::imports::import;
 use crate::lexer::Lexer;
-use crate::mixin::{eat_include, Mixin};
 use crate::scope::{insert_global_var, Scope, GLOBAL_SCOPE};
 use crate::selector::Selector;
 use crate::style::Style;
@@ -109,10 +107,8 @@ mod common;
 mod css;
 mod error;
 mod format;
-mod function;
 mod imports;
 mod lexer;
-mod mixin;
 mod scope;
 mod selector;
 mod style;
diff --git a/src/scope.rs b/src/scope.rs
index c8bd986..ac7d0e8 100644
--- a/src/scope.rs
+++ b/src/scope.rs
@@ -2,8 +2,7 @@ use std::cell::RefCell;
 use std::collections::HashMap;
 
 use crate::error::SassResult;
-use crate::function::Function;
-use crate::mixin::Mixin;
+use crate::atrule::{Function, Mixin};
 use crate::value::Value;
 
 thread_local!(pub(crate) static GLOBAL_SCOPE: RefCell<Scope> = RefCell::new(Scope::new()));