diff --git a/editor/libeditor/EditorBase.cpp b/editor/libeditor/EditorBase.cpp
index 60df3571ef..ef5845ffe0 100644
--- a/editor/libeditor/EditorBase.cpp
+++ b/editor/libeditor/EditorBase.cpp
@@ -4201,7 +4201,7 @@ EditorBase::DeleteSelectionAndPrepareToCreateNode()
   NS_ENSURE_TRUE(selection, NS_ERROR_NULL_POINTER);
   MOZ_ASSERT(selection->GetAnchorFocusRange());
 
-  if (!selection->GetAnchorFocusRange()->Collapsed()) {
+  if (selection->GetAnchorFocusRange() && !selection->GetAnchorFocusRange()->Collapsed()) {
     nsresult rv = DeleteSelection(nsIEditor::eNone, nsIEditor::eStrip);
     NS_ENSURE_SUCCESS(rv, rv);