diff --git a/lib/redis/rediswriter-objects.cpp b/lib/redis/rediswriter-objects.cpp
index db0e2f5de..6cb41a5e3 100644
--- a/lib/redis/rediswriter-objects.cpp
+++ b/lib/redis/rediswriter-objects.cpp
@@ -1637,7 +1637,7 @@ Dictionary::Ptr RedisWriter::SerializeState(const Checkable::Ptr& checkable)
 		attrs->Set("severity", host->GetSeverity());
 	}
 
-	attrs->Set("previous_hard_state", Convert::ToString(GetPreviousHardState(checkable, service)));
+	attrs->Set("previous_hard_state", GetPreviousHardState(checkable, service));
 	attrs->Set("check_attempt", checkable->GetCheckAttempt());
 
 	attrs->Set("is_active", checkable->IsActive());