1 files changed, 1 insertions, 0 deletions
diff --git a/runtime/safe_map.h b/runtime/safe_map.h
index f9d81dc3cb..402c7e9cb5 100644
--- a/runtime/safe_map.h
+++ b/runtime/safe_map.h
@@ -44,6 +44,7 @@ class SafeMap {
   typedef typename ::std::map<K, V, Comparator, Allocator>::value_type value_type;
 
   SafeMap() = default;
+  SafeMap(const SafeMap&) = default;
   explicit SafeMap(const key_compare& cmp, const allocator_type& allocator = allocator_type())
     : map_(cmp, allocator) {
   }