diff --git a/xpfe/components/history/src/nsGlobalHistory.cpp b/xpfe/components/history/src/nsGlobalHistory.cpp
index 31f5324482ca..91572c21e962 100644
--- a/xpfe/components/history/src/nsGlobalHistory.cpp
+++ b/xpfe/components/history/src/nsGlobalHistory.cpp
@@ -696,6 +696,8 @@ nsGlobalHistory::nsGlobalHistory()
     mBatchesInProgress(0),
     mNowValid(PR_FALSE),
     mDirty(PR_FALSE),
+    mDataCaptureMode(0),
+    mLearningMode(0),
     mAutoCompleteLearner(nsnull),
     mACFeatures(nsnull),
     mURLDataFile(nsnull),