diff --git a/src/utils/ast/ast.h b/src/utils/ast/ast.h
index 5bfd8df..8e01551 100644
--- a/src/utils/ast/ast.h
+++ b/src/utils/ast/ast.h
@@ -1,7 +1,7 @@
 #ifndef AST_H
 #define AST_H
 
-#include "lists.h"
+#include "../lists/lists.h"
 
 enum ast_type
 {
@@ -10,28 +10,30 @@ enum ast_type
     AST_CMD
 };
 
-union ast_node
+struct ast_cmd
 {
-    struct ast_if;
-    struct ast_cmd;
+    struct list *cmd;
 };
 
+union ast_node;
+
 struct ast
 {
     enum ast_type type;
-    union ast_node data;
+    union ast_node *data;
 };
 
 struct ast_if
 {
-    struct ast* condition;  
-    struct ast* then_clause;
-    struct ast* else_clause;
+    struct ast *condition;
+    struct ast *then_clause;
+    struct ast *else_clause;
 };
 
-struct ast_cmd
+union ast_node
 {
-    struct list* cmd;
+    struct ast_if *ast_if;
+    struct ast_cmd *ast_cmd;
 };
 
 #endif /* ! AST_H */