diff --git a/editor/base/nsWSRunObject.cpp b/editor/base/nsWSRunObject.cpp
index 82458a60622..1624abac11f 100644
--- a/editor/base/nsWSRunObject.cpp
+++ b/editor/base/nsWSRunObject.cpp
@@ -62,10 +62,10 @@ mNode()
 ,mOffset(0)
 ,mStartNode()
 ,mStartOffset(0)
-,mStartReason()
+,mStartReason(0)
 ,mEndNode()
 ,mEndOffset(0)
-,mEndReason()
+,mEndReason(0)
 ,mFirstNBSPNode()
 ,mFirstNBSPOffset(0)
 ,mLastNBSPNode()
@@ -83,9 +83,10 @@ mNode(aNode)
 ,mOffset(aOffset)
 ,mStartNode()
 ,mStartOffset(0)
+,mStartReason(0)
 ,mEndNode()
 ,mEndOffset(0)
-,mEndReason()
+,mEndReason(0)
 ,mFirstNBSPNode()
 ,mFirstNBSPOffset(0)
 ,mLastNBSPNode()
diff --git a/editor/libeditor/html/nsWSRunObject.cpp b/editor/libeditor/html/nsWSRunObject.cpp
index 82458a60622..1624abac11f 100644
--- a/editor/libeditor/html/nsWSRunObject.cpp
+++ b/editor/libeditor/html/nsWSRunObject.cpp
@@ -62,10 +62,10 @@ mNode()
 ,mOffset(0)
 ,mStartNode()
 ,mStartOffset(0)
-,mStartReason()
+,mStartReason(0)
 ,mEndNode()
 ,mEndOffset(0)
-,mEndReason()
+,mEndReason(0)
 ,mFirstNBSPNode()
 ,mFirstNBSPOffset(0)
 ,mLastNBSPNode()
@@ -83,9 +83,10 @@ mNode(aNode)
 ,mOffset(aOffset)
 ,mStartNode()
 ,mStartOffset(0)
+,mStartReason(0)
 ,mEndNode()
 ,mEndOffset(0)
-,mEndReason()
+,mEndReason(0)
 ,mFirstNBSPNode()
 ,mFirstNBSPOffset(0)
 ,mLastNBSPNode()