diff --git a/src/libCom/timer/timer.cpp b/src/libCom/timer/timer.cpp
index ae8f684f3..f19bbc4cd 100644
--- a/src/libCom/timer/timer.cpp
+++ b/src/libCom/timer/timer.cpp
@@ -66,7 +66,7 @@ void timer::start ( epicsTimerNotify & notify, const epicsTime & expire )
 void timer::privateStart ( epicsTimerNotify & notify, const epicsTime & expire )
 {
     this->pNotify = & notify;
-    this->exp = expire - this->queue.sleepQuantumOverTwo;
+    this->exp = expire - ( this->queue.notify.quantum () / 2.0 );
 
     bool reschedualNeeded = false;
     if ( this->curState == stateActive ) {
diff --git a/src/libCom/timer/timerPrivate.h b/src/libCom/timer/timerPrivate.h
index b530ed604..8ef6a23e5 100644
--- a/src/libCom/timer/timerPrivate.h
+++ b/src/libCom/timer/timerPrivate.h
@@ -100,7 +100,6 @@ private:
     mutable epicsMutex mutex;
     epicsEvent cancelBlockingEvent;
     tsDLList < timer > timerList;
-    const double sleepQuantumOverTwo;
     epicsTimerQueueNotify & notify;
     timer * pExpireTmr;
     epicsThreadId processThread;
@@ -138,6 +137,7 @@ private:
     epicsEvent rescheduleEvent;
     epicsEvent exitEvent;
     epicsThread thread;
+    double sleepQuantum;
     bool okToShare;
     bool exitFlag;
     bool terminateFlag;
diff --git a/src/libCom/timer/timerQueue.cpp b/src/libCom/timer/timerQueue.cpp
index 7f9cd5cf1..c4f69eb0a 100644
--- a/src/libCom/timer/timerQueue.cpp
+++ b/src/libCom/timer/timerQueue.cpp
@@ -21,8 +21,7 @@
 
 epicsTimerQueue::~epicsTimerQueue () {}
 
-timerQueue::timerQueue ( epicsTimerQueueNotify &notifyIn ) :
-    sleepQuantumOverTwo ( notifyIn.quantum () / 2.0 ), 
+timerQueue::timerQueue ( epicsTimerQueueNotify & notifyIn ) :
     notify ( notifyIn ), pExpireTmr ( 0 ),  
     processThread ( 0 ), cancelPending ( false )
 {
diff --git a/src/libCom/timer/timerQueueActive.cpp b/src/libCom/timer/timerQueueActive.cpp
index e7ee0a3c4..61c191e01 100644
--- a/src/libCom/timer/timerQueueActive.cpp
+++ b/src/libCom/timer/timerQueueActive.cpp
@@ -43,7 +43,8 @@ epicsTimerQueueActive & epicsTimerQueueActive::allocate ( bool okToShare, unsign
 timerQueueActive::timerQueueActive ( bool okToShareIn, unsigned priority ) :
     queue ( *this ), thread ( *this, "timerQueue", 
         epicsThreadGetStackSize ( epicsThreadStackMedium ), priority ),
-    okToShare ( okToShareIn ), exitFlag ( false ), terminateFlag ( false )
+    sleepQuantum ( epicsThreadSleepQuantum() ), okToShare ( okToShareIn ), 
+    exitFlag ( false ), terminateFlag ( false )
 {
     this->thread.start ();
 }
@@ -88,7 +89,7 @@ void timerQueueActive::reschedule ()
 
 double timerQueueActive::quantum ()
 {
-    return epicsThreadSleepQuantum ();
+    return this->sleepQuantum;
 }
 
 void timerQueueActive::show ( unsigned int level ) const