diff --git a/attribute.hpp b/attribute.hpp
index ebc22e7f..c4d999e9 100644
--- a/attribute.hpp
+++ b/attribute.hpp
@@ -1,6 +1,9 @@
 #ifndef ATTRIBUTE_HPP
 #define ATTRIBUTE_HPP
 
+#include <vector>
+#include <map>
+
 enum attribute_op {
 	op_sum,
 	op_product,