diff --git a/challenges/08-coding-interview-questions-and-take-home-assignments/coding-interview-data-structure-questions.json b/challenges/08-coding-interview-questions-and-take-home-assignments/coding-interview-data-structure-questions.json
index 37382134ec..899ebfd88b 100644
--- a/challenges/08-coding-interview-questions-and-take-home-assignments/coding-interview-data-structure-questions.json
+++ b/challenges/08-coding-interview-questions-and-take-home-assignments/coding-interview-data-structure-questions.json
@@ -1056,7 +1056,7 @@
         "    this.next = null; ",
         "  }; ",
         "",
-        "  this.length = function(){",
+        "  this.size = function(){",
         "    return length;",
         "  };",
         "",