diff --git a/include/yorel/yomm2/runtime.hpp b/include/yorel/yomm2/runtime.hpp
index 4cea8225..1a77ea02 100644
--- a/include/yorel/yomm2/runtime.hpp
+++ b/include/yorel/yomm2/runtime.hpp
@@ -184,7 +184,7 @@ operator<<(std::ostream& os, Container<rt_class*, T...>& classes) {
     return os << ")";
 }
 
-struct yOMM2_API runtime_data {
+struct runtime_data {
 
     std::unordered_map<std::type_index, rt_class*> class_map;
     std::deque<rt_class> classes;
@@ -195,7 +195,7 @@ struct yOMM2_API runtime_data {
 };
 
 template<class Policy>
-struct yOMM2_API runtime : runtime_data {
+struct runtime : runtime_data {
 
     runtime();