diff --git a/pvDataApp/monitor/monitor.h b/pvDataApp/monitor/monitor.h
index fe76ad5..bd34c42 100644
--- a/pvDataApp/monitor/monitor.h
+++ b/pvDataApp/monitor/monitor.h
@@ -31,7 +31,7 @@ class MonitorElement {
     public:
     POINTER_DEFINITIONS(MonitorElement);
     MonitorElement(){}
-    MonitorElement(PVStructurePtr const &pvStructurePtr)
+    MonitorElement(PVStructurePtr const & pvStructurePtr)
     : pvStructurePtr(pvStructurePtr),
       changedBitSet(BitSet::create(pvStructurePtr->getNumberFields())),
       overrunBitSet(BitSet::create(pvStructurePtr->getNumberFields()))
@@ -64,7 +64,7 @@ class Monitor : public Destroyable{
      * @return monitorElement for modified data.
      * Must call get to determine if data is available.
      */
-    virtual MonitorElementPtr &poll() = 0;
+    virtual MonitorElementPtr poll() = 0;
     /**
      * Release a MonitorElement that was returned by poll.
      * @param monitorElement
@@ -87,19 +87,19 @@ class MonitorRequester : public virtual Requester {
      * @param monitor The monitor
      * @param structure The structure defining the data.
      */
-    virtual void monitorConnect(Status const &status,
+    virtual void monitorConnect(Status const & status,
         MonitorPtr const & monitor, StructureConstPtr const & structure) = 0;
     /**
      * A monitor event has occurred.
      * The requester must call Monitor.poll to get data.
      * @param monitor The monitor.
      */
-    virtual void monitorEvent(MonitorPtr const &monitor) = 0;
+    virtual void monitorEvent(MonitorPtr const & monitor) = 0;
     /**
      * The data source is no longer available.
      * @param monitor The monitor.
      */
-    virtual void unlisten(MonitorPtr const &monitor) = 0;
+    virtual void unlisten(MonitorPtr const & monitor) = 0;
 };
 
 }}