diff --git a/src/clientimpl.h b/src/clientimpl.h
index d0a3237..d4a0718 100644
--- a/src/clientimpl.h
+++ b/src/clientimpl.h
@@ -84,7 +84,7 @@ struct Connection : public ConnBase, public std::enable_shared_from_this<Connect
     // entries always have matching entry in a Channel::opByIOID
     std::map<uint32_t, RequestInfo> opByIOID;
 
-    uint32_t nextIOID = 0u;
+    uint32_t nextIOID = 0x10002000u;
 
     INST_COUNTER(Connection);
 
@@ -171,7 +171,7 @@ struct Context::Pvt
 
     const Value caMethod;
 
-    uint32_t nextCID=0u;
+    uint32_t nextCID=0x12345678;
 
     evsocket searchTx;
     uint16_t searchRxPort;
diff --git a/src/serverconn.cpp b/src/serverconn.cpp
index 6a76d6f..e8465b6 100644
--- a/src/serverconn.cpp
+++ b/src/serverconn.cpp
@@ -32,7 +32,6 @@ ServerConn::ServerConn(ServIface* iface, evutil_socket_t sock, struct sockaddr *
               bufferevent_socket_new(iface->server->acceptor_loop.base, sock, BEV_OPT_CLOSE_ON_FREE|BEV_OPT_DEFER_CALLBACKS),
               SockAddr(peer, socklen))
     ,iface(iface)
-    ,nextSID(0)
 {
     log_debug_printf(connio, "Client %s connects\n", peerName.c_str());
 
diff --git a/src/serverconn.h b/src/serverconn.h
index cc3a446..2872428 100644
--- a/src/serverconn.h
+++ b/src/serverconn.h
@@ -108,7 +108,7 @@ struct ServerConn : public ConnBase, public std::enable_shared_from_this<ServerC
     std::string autoMethod;
     Value credentials;
 
-    uint32_t nextSID;
+    uint32_t nextSID=0x07050301;
     std::map<uint32_t, std::shared_ptr<ServerChan> > chanBySID;
     std::map<uint32_t, std::shared_ptr<ServerOp> > opByIOID;