diff --git a/akka-distributed-data/src/main/scala/akka/cluster/ddata/DurableStore.scala b/akka-distributed-data/src/main/scala/akka/cluster/ddata/DurableStore.scala
index 4b38fea365..a50385def1 100644
--- a/akka-distributed-data/src/main/scala/akka/cluster/ddata/DurableStore.scala
+++ b/akka-distributed-data/src/main/scala/akka/cluster/ddata/DurableStore.scala
@@ -192,7 +192,7 @@ final class LmdbDurableStore(config: Config) extends Actor with ActorLogging {
     }
   }
 
-  def receive = init
+  def receive: Receive = init
 
   def init: Receive = {
     case LoadAll =>