diff --git a/include/llvm/ADT/DenseSet.h b/include/llvm/ADT/DenseSet.h
index 89f55ca..0898b96 100644
--- a/include/llvm/ADT/DenseSet.h
+++ b/include/llvm/ADT/DenseSet.h
@@ -41,8 +41,8 @@
     return TheMap.count(V);
   }
 
-  void erase(const ValueT &V) {
-    TheMap.erase(V);
+  bool erase(const ValueT &V) {
+    return TheMap.erase(V);
   }
 
   DenseSet &operator=(const DenseSet &RHS) {