diff --git a/libraries/chain/event_group_evaluator.cpp b/libraries/chain/event_group_evaluator.cpp
index 92cad92b..cd4f6a78 100644
--- a/libraries/chain/event_group_evaluator.cpp
+++ b/libraries/chain/event_group_evaluator.cpp
@@ -100,6 +100,7 @@ void_result event_group_update_evaluator::do_apply(const event_group_update_oper
     
 void_result event_group_delete_evaluator::do_evaluate(const event_group_delete_operation& op)
 { try {
+    FC_ASSERT(db().head_block_time() >= HARDFORK_1000_TIME);
     FC_ASSERT(trx_state->_is_proposed_trx);
     
     //check for event group existence
diff --git a/libraries/chain/sport_evaluator.cpp b/libraries/chain/sport_evaluator.cpp
index 4582be3e..3af8093e 100644
--- a/libraries/chain/sport_evaluator.cpp
+++ b/libraries/chain/sport_evaluator.cpp
@@ -74,6 +74,7 @@ void_result sport_update_evaluator::do_apply(const sport_update_operation& op)
     
 void_result sport_delete_evaluator::do_evaluate( const sport_delete_operation& op )
 { try {
+   FC_ASSERT(db().head_block_time() >= HARDFORK_1000_TIME);
    FC_ASSERT(trx_state->_is_proposed_trx);
     
    //check for sport existence