diff --git a/src/ast/mod.rs b/src/ast/mod.rs
index 7be8600..6912899 100644
--- a/src/ast/mod.rs
+++ b/src/ast/mod.rs
@@ -14,6 +14,8 @@ pub use statement::Block;
 pub use statement::GlobalBlock;
 pub use statement::Declaration;
 pub use statement::DeclarationBuilder;
+pub use statement::TypeDef;
+pub use statement::TypeDefBuilder;
 
 pub trait GazType {
     fn get_base(&self) -> BaseType;
diff --git a/src/ast/statement.rs b/src/ast/statement.rs
index 4ff3d5d..2ce8a9e 100644
--- a/src/ast/statement.rs
+++ b/src/ast/statement.rs
@@ -9,6 +9,7 @@ use super::GazType;
 pub enum Stat {
     Block(Box<Block>),
     Declaration(Box<Declaration>),
+    TypeDef(Box<TypeDef>),
 }
 
 impl Stat {
@@ -19,6 +20,10 @@ impl Stat {
     pub fn new_decl(x: Declaration) -> Self {
         Self::Declaration(Box::new(x))
     }
+
+    pub fn new_typedef(x: TypeDef) -> Self {
+        Self::TypeDef(Box::new(x))
+    }
 }
 
 impl ToString for Stat {
@@ -26,6 +31,7 @@ impl ToString for Stat {
         match self {
             Stat::Block(x) => x.to_string(),
             Stat::Declaration(x) => x.to_string(),
+            Stat::TypeDef(x) => x.to_string(),
         }
     }
 }
@@ -101,3 +107,21 @@ impl ToString for Declaration {
         s
     }
 }
+
+#[derive(Clone, Default, Builder)]
+pub struct TypeDef {
+    old_name: String,
+    new_name: String,
+    basetype: BaseType,
+}
+
+impl ToString for TypeDef {
+    fn to_string(&self) -> String {
+        let mut s = String::from("typedef ");
+        s.push_str(&self.old_name);
+        s.push(' ');
+        s.push_str(&self.new_name);
+        s.push(';');
+        s
+    }
+}