diff --git a/src/server/server.cc b/src/server/server.cc
index a5c9732fb8b..96241bd2b16 100644
--- a/src/server/server.cc
+++ b/src/server/server.cc
@@ -529,6 +529,7 @@ void Server::UnblockOnStreams(const std::vector<std::string> &keys, Redis::Conne
         }
         break;
       }
+      ++it;
     }
   }
 }