diff --git a/modules/ripple_basics/events/ripple_UptimeTimer.h b/modules/ripple_basics/events/ripple_UptimeTimer.h
index 8093dae75..d715db9cf 100644
--- a/modules/ripple_basics/events/ripple_UptimeTimer.h
+++ b/modules/ripple_basics/events/ripple_UptimeTimer.h
@@ -44,7 +44,7 @@ public:
 private:
 	// VFALCO: DEPRECATED, Use a memory barrier instead of forcing a cache line
 	int m_pad1; // make sure m_elapsedTime fits in its own cache line
-	int m_elapsedTime;
+	int volatile m_elapsedTime;
 	int m_pad2;
 
 	time_t m_startTime;