diff --git a/src/ims/in-memory-storage-persistent.hpp b/src/ims/in-memory-storage-persistent.hpp
index 5920ef3..a458a40 100644
--- a/src/ims/in-memory-storage-persistent.hpp
+++ b/src/ims/in-memory-storage-persistent.hpp
@@ -35,7 +35,7 @@
   InMemoryStoragePersistent();
 
   explicit
-  InMemoryStoragePersistent(boost::asio::io_service& ioService);
+  InMemoryStoragePersistent(DummyIoService& ioService);
 
 NDN_CXX_PUBLIC_WITH_TESTS_ELSE_PROTECTED:
   /** @brief Do nothing.