diff --git a/RTCP/Cobalt/OutputProc/src/MSWriterDAL.cc b/RTCP/Cobalt/OutputProc/src/MSWriterDAL.cc
index 46b3de6e8e23f4790a2dfedda200e1143be41388..114b14e042b1eb6bb55e3323eee9d1e760d08de5 100644
--- a/RTCP/Cobalt/OutputProc/src/MSWriterDAL.cc
+++ b/RTCP/Cobalt/OutputProc/src/MSWriterDAL.cc
@@ -39,6 +39,7 @@
 #include <Common/Thread/Mutex.h>
 #include <CoInterface/StreamableData.h>
 #include <CoInterface/LTAFeedback.h>
+#include <CoInterface/SmartPtr.h>
 #include <OutputProc/CommonLofarAttributes.h>
 #include <OutputProc/Package__Version.h>