diff --git a/src/misc/pv/thread.h b/src/misc/pv/thread.h
index 5cc1fd5..b4b6b6c 100644
--- a/src/misc/pv/thread.h
+++ b/src/misc/pv/thread.h
@@ -158,7 +158,7 @@ public:
     Thread(std::string name,
            ThreadPriority priority,
            Runnable *runnable,
-           epicsThreadStackSizeClass stkcls=epicsThreadStackSmall);
+           epicsThreadStackSizeClass stkcls=epicsThreadStackBig);
 
     /**
      * 
diff --git a/src/misc/reftrack.cpp b/src/misc/reftrack.cpp
index 2a4a9de..d13b386 100644
--- a/src/misc/reftrack.cpp
+++ b/src/misc/reftrack.cpp
@@ -223,7 +223,7 @@ void RefMonitor::start(double period)
     impl->period = period;
     impl->worker.reset(new epicsThread(*impl,
                                        "RefMonitor",
-                                       epicsThreadGetStackSize(epicsThreadStackSmall),
+                                       epicsThreadGetStackSize(epicsThreadStackBig),
                                        epicsThreadPriorityMin));
     impl->worker->start();
 }
diff --git a/src/misc/thread.cpp b/src/misc/thread.cpp
index ddaa916..cca111d 100644
--- a/src/misc/thread.cpp
+++ b/src/misc/thread.cpp
@@ -52,7 +52,7 @@ void Thread::Config::x_setdefault()
     this->p_prio = epicsThreadPriorityLow;
     this->p_autostart = true;
     this->p_runner = NULL;
-    (*this).stack(epicsThreadStackSmall);
+    (*this).stack(epicsThreadStackBig);
 }
 
 size_t Thread::num_instances;