diff --git a/libraries/chain/include/graphene/chain/event_group_object.hpp b/libraries/chain/include/graphene/chain/event_group_object.hpp
index 75d26ff8..5f472e07 100644
--- a/libraries/chain/include/graphene/chain/event_group_object.hpp
+++ b/libraries/chain/include/graphene/chain/event_group_object.hpp
@@ -26,7 +26,7 @@
 #include <graphene/chain/protocol/types.hpp>
 #include <graphene/db/object.hpp>
 #include <graphene/db/generic_index.hpp>
-
+#include <boost/multi_index/composite_key.hpp>
 
 namespace graphene { namespace chain {
 
diff --git a/libraries/chain/include/graphene/chain/event_object.hpp b/libraries/chain/include/graphene/chain/event_object.hpp
index 530f0bef..c8c9b493 100644
--- a/libraries/chain/include/graphene/chain/event_object.hpp
+++ b/libraries/chain/include/graphene/chain/event_object.hpp
@@ -29,6 +29,7 @@
 #include <graphene/chain/protocol/event.hpp>
 #include <sstream>
 
+#include <boost/multi_index/composite_key.hpp>
 
 namespace graphene { namespace chain {
    class event_object;