diff --git a/src/client/clientGet.cpp b/src/client/clientGet.cpp
index 8c8a484..aaa69fe 100644
--- a/src/client/clientGet.cpp
+++ b/src/client/clientGet.cpp
@@ -37,7 +37,7 @@ struct GetPutter : public pva::ChannelPutRequester,
 
     GetPutter(pvac::ClientChannel::GetCallback* cb) :started(false), getcb(cb), putcb(0) {}
     GetPutter(pvac::ClientChannel::PutCallback* cb) :started(false), getcb(0), putcb(cb) {}
-    virtual ~GetPutter() {}
+    virtual ~GetPutter() {cancel();}
 
     void callEvent(Guard& G, pvac::GetEvent::event_t evt = pvac::GetEvent::Fail)
     {
diff --git a/src/client/clientRPC.cpp b/src/client/clientRPC.cpp
index f983f3b..4dff91a 100644
--- a/src/client/clientRPC.cpp
+++ b/src/client/clientRPC.cpp
@@ -36,7 +36,7 @@ struct RPCer : public pva::ChannelRPCRequester,
 
     RPCer(pvac::ClientChannel::GetCallback* cb,
           const pvd::PVStructure::const_shared_pointer& args) :started(false), cb(cb), args(args) {}
-    virtual ~RPCer() {}
+    virtual ~RPCer() {cancel();}
 
     void callEvent(Guard& G, pvac::GetEvent::event_t evt = pvac::GetEvent::Fail)
     {