diff --git a/include/llvm/ADT/DenseMap.h b/include/llvm/ADT/DenseMap.h
index fa3e2df8947..646ee40c154 100644
--- a/include/llvm/ADT/DenseMap.h
+++ b/include/llvm/ADT/DenseMap.h
@@ -53,7 +53,7 @@ class DenseMap {
   unsigned NumEntries;
   DenseMap(const DenseMap &); // not implemented.
 public:
-  explicit DenseMap(unsigned NumInitBuckets = 8) {
+  explicit DenseMap(unsigned NumInitBuckets = 64) {
     init(NumInitBuckets);
   }
   ~DenseMap() {