diff --git a/editor/libeditor/base/DeleteRangeTxn.cpp b/editor/libeditor/base/DeleteRangeTxn.cpp
index 545d964c9bb0..45ea2c72c79c 100644
--- a/editor/libeditor/base/DeleteRangeTxn.cpp
+++ b/editor/libeditor/base/DeleteRangeTxn.cpp
@@ -310,7 +310,6 @@ NS_IMETHODIMP DeleteRangeTxn::CreateTxnsToDeleteContent(nsIDOMNode *aParent,
 }
 
 static NS_DEFINE_IID(kSubtreeIteratorCID, NS_SUBTREEITERATOR_CID);
-static NS_DEFINE_IID(kRangeCID, NS_RANGE_CID);
 
 NS_IMETHODIMP DeleteRangeTxn::CreateTxnsToDeleteNodesBetween()
 {