diff --git a/dom/base/Selection.h b/dom/base/Selection.h
index 9b14d4ec8f45..14ca7baab72e 100644
--- a/dom/base/Selection.h
+++ b/dom/base/Selection.h
@@ -428,6 +428,8 @@ class Selection final : public nsSupportsWeakReference,
   SelectionType Type() const { return mSelectionType; }
 
   /**
+   * See documentation of `GetRangesForInterval` in Selection.webidl.
+   *
    * @param aReturn references, not copies, of the internal ranges.
    */
   void GetRangesForInterval(nsINode& aBeginNode, int32_t aBeginOffset,