diff --git a/src/remote/pv/remote.h b/src/remote/pv/remote.h
index b70b0e3..4b7091f 100644
--- a/src/remote/pv/remote.h
+++ b/src/remote/pv/remote.h
@@ -119,7 +119,7 @@ void hackAroundRTEMSSocketInterrupt();
 /**
  * Interface defining transport send control.
  */
-class TransportSendControl : public epics::pvData::SerializableControl {
+class epicsShareClass TransportSendControl : public epics::pvData::SerializableControl {
 public:
     POINTER_DEFINITIONS(TransportSendControl);
 
diff --git a/src/rpcService/pv/rpcService.h b/src/rpcService/pv/rpcService.h
index 292c9e5..4119943 100644
--- a/src/rpcService/pv/rpcService.h
+++ b/src/rpcService/pv/rpcService.h
@@ -29,7 +29,7 @@
 namespace epics {
 namespace pvAccess {
 
-class epicsShareClass RPCRequestException : public std::runtime_error {
+class RPCRequestException : public std::runtime_error {
 public:
 
     explicit RPCRequestException(std::string const & message) :
diff --git a/src/utils/pv/destroyable.h b/src/utils/pv/destroyable.h
index 07dfed6..88f03a7 100644
--- a/src/utils/pv/destroyable.h
+++ b/src/utils/pv/destroyable.h
@@ -21,7 +21,7 @@ namespace epics { namespace pvAccess {
         /**
          * @brief Instance declaring destroy method.
          */
-        class Destroyable {
+        class epicsShareClass Destroyable {
         public:
             POINTER_DEFINITIONS(Destroyable);
             /**