Minor improvements.

2 files changed, 5 insertions, 3 deletions

diff --git a/tddb/td/db/BinlogKeyValue.h b/tddb/td/db/BinlogKeyValue.h
index fa9cc405a..0665aefa8 100644
--- a/tddb/td/db/BinlogKeyValue.h
+++ b/tddb/td/db/BinlogKeyValue.h
@@ -15,6 +15,7 @@
 #include "td/utils/buffer.h"
 #include "td/utils/common.h"
 #include "td/utils/FlatHashMap.h"
+#include "td/utils/HashTableUtils.h"
 #include "td/utils/logging.h"
 #include "td/utils/misc.h"
 #include "td/utils/port/RwMutex.h"
@@ -219,9 +220,9 @@ class BinlogKeyValue final : public KeyValueSyncInterface {
     binlog_->lazy_sync(std::move(promise));
   }
 
-  std::unordered_map<string, string> prefix_get(Slice prefix) final {
+  std::unordered_map<string, string, Hash<string>> prefix_get(Slice prefix) final {
     auto lock = rw_mutex_.lock_write().move_as_ok();
-    std::unordered_map<string, string> res;
+    std::unordered_map<string, string, Hash<string>> res;
     for (const auto &kv : map_) {
       if (begins_with(kv.first, prefix)) {
         res.emplace(kv.first.substr(prefix.size()), kv.second.first);
diff --git a/tddb/td/db/KeyValueSyncInterface.h b/tddb/td/db/KeyValueSyncInterface.h
index 0fb50ced8..ed29c6b96 100644
--- a/tddb/td/db/KeyValueSyncInterface.h
+++ b/tddb/td/db/KeyValueSyncInterface.h
@@ -8,6 +8,7 @@
 
 #include "td/utils/common.h"
 #include "td/utils/FlatHashMap.h"
+#include "td/utils/HashTableUtils.h"
 #include "td/utils/Promise.h"
 #include "td/utils/Slice.h"
 
@@ -34,7 +35,7 @@ class KeyValueSyncInterface {
 
   virtual string get(const string &key) = 0;
 
-  virtual std::unordered_map<string, string> prefix_get(Slice prefix) = 0;
+  virtual std::unordered_map<string, string, Hash<string>> prefix_get(Slice prefix) = 0;
 
   virtual FlatHashMap<string, string> get_all() = 0;