1 files changed, 4 insertions, 4 deletions
diff --git a/qpid/cpp/src/qpid/broker/DtxBuffer.h b/qpid/cpp/src/qpid/broker/DtxBuffer.h
index 1511cb032f..d31b36083a 100644
--- a/qpid/cpp/src/qpid/broker/DtxBuffer.h
+++ b/qpid/cpp/src/qpid/broker/DtxBuffer.h
@@ -7,9 +7,9 @@
  * to you under the Apache License, Version 2.0 (the
  * "License"); you may not use this file except in compliance
  * with the License.  You may obtain a copy of the License at
- * 
+ *
  *   http://www.apache.org/licenses/LICENSE-2.0
- * 
+ *
  * Unless required by applicable law or agreed to in writing,
  * software distributed under the License is distributed on an
  * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
@@ -27,11 +27,11 @@
 
 namespace qpid {
     namespace broker {
-        class DtxBuffer : public TxBuffer{
+        class QPID_BROKER_CLASS_EXTERN DtxBuffer : public TxBuffer{
             sys::Mutex lock;
             const std::string xid;
             bool ended;
-            bool suspended;           
+            bool suspended;
             bool failed;
             bool expired;