diff --git a/Library/Meter.cpp b/Library/Meter.cpp
index eeadb22d..72949bf1 100644
--- a/Library/Meter.cpp
+++ b/Library/Meter.cpp
@@ -62,6 +62,8 @@ CMeter::CMeter(CMeterWindow* meterWindow)
 	m_HasMouseAction = false;
 	m_MouseActionCursor = true;
 
+	m_ToolTipHandle = NULL;
+
 	m_MeterWindow = meterWindow;
 }