diff --git a/indra/llui/lltoolbar.cpp b/indra/llui/lltoolbar.cpp
index c34fbcd4f51415d8d02150c0a6caf48438c579d3..1f5fa5f361e6bcf3b692d034d6b7859e84ec9b18 100644
--- a/indra/llui/lltoolbar.cpp
+++ b/indra/llui/lltoolbar.cpp
@@ -723,7 +723,10 @@ LLToolBarButton::LLToolBarButton(const Params& p)
 	mId(""),
 	mIsEnabledSignal(NULL),
 	mIsRunningSignal(NULL),
-	mIsStartingSignal(NULL)
+	mIsStartingSignal(NULL),
+	mIsDragged(false),
+	mStartDragItemCallback(NULL),
+	mHandleDragItemCallback(NULL)
 {
 	mButtonFlashRate = 0.0;
 	mButtonFlashCount = 0;