diff --git a/include/utils/data.hh b/include/utils/data.hh
index 0001345..d1ff35a 100644
--- a/include/utils/data.hh
+++ b/include/utils/data.hh
@@ -38,6 +38,9 @@ namespace ppc::data {
         bool is_number() const;
         bool is_string() const;
         bool is_bool() const;
+        bool is_true() {
+            return is_bool() && boolean();
+        }
 
         array_t &array(const array_t &arr);
         map_t &map(const map_t &map);
diff --git a/src/compiler/treeifier/ast/ast.cc b/src/compiler/treeifier/ast/ast.cc
index 83abea1..13ba48b 100644
--- a/src/compiler/treeifier/ast/ast.cc
+++ b/src/compiler/treeifier/ast/ast.cc
@@ -20,5 +20,6 @@ ast_ctx_t::ast_ctx_t(msg_stack_t &messages, std::vector<token_t> &tokens): messa
         .add_last("$_exp", parse_stat_exp);
     group("$_def")
         .add_last("$_func", parse_func)
+        .add_named("$_export", parse_export, { "export" })
         .add_last("$_field", parse_field);
 }
\ No newline at end of file
diff --git a/src/compiler/treeifier/ast/parsers/export.cc b/src/compiler/treeifier/ast/parsers/export.cc
new file mode 100644
index 0000000..dfd29a8
--- /dev/null
+++ b/src/compiler/treeifier/ast/parsers/export.cc
@@ -0,0 +1,12 @@
+#include "compiler/treeifier/ast/helper.hh"
+
+bool ast::parse_export(ast_ctx_t &ctx, size_t &res_i, map_t &out) {
+    tree_helper_t h(ctx, res_i);
+
+    if (out["exported"].is_true()) {
+        ctx.messages.push(message_t(message_t::WARNING, "Export is alredy specified for this definition.", h.prev_loc()));
+    }
+    out["exported"] = true;
+
+    return ctx.group("$_def")(ctx, res_i, out);
+}