diff --git a/closure/goog/structs/heap.js b/closure/goog/structs/heap.js
index <HASH>..<HASH> 100644
--- a/closure/goog/structs/heap.js
+++ b/closure/goog/structs/heap.js
@@ -144,7 +144,7 @@ goog.structs.Heap.prototype.peek = function() {
 
 /**
  * Retrieves but does not remove the key of the root node of this heap.
- * @return {V} The key at the root of the heap. Returns undefined if the
+ * @return {K} The key at the root of the heap. Returns undefined if the
  *     heap is empty.
  */
 goog.structs.Heap.prototype.peekKey = function() {
Fix the return type of peekKey method
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Created by MOE: <URL>