diff --git a/CHANGELOG.md b/CHANGELOG.md
index 8468ca02..c1db7e02 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -6,6 +6,7 @@ Version 83:
 * Turn some flat_static_buffer_tests on
 * Documentation work
 * read_some, async_read_some return bytes used
+* Fix private timer::clock_type
 
 WebSocket
 
diff --git a/test/benchmarks/utf8_checker.cpp b/test/benchmarks/utf8_checker.cpp
index bdb8c5da..9ca893b8 100644
--- a/test/benchmarks/utf8_checker.cpp
+++ b/test/benchmarks/utf8_checker.cpp
@@ -22,9 +22,11 @@ public:
 
     class timer
     {
+    public:
         using clock_type =
             std::chrono::system_clock;
 
+    private:
         clock_type::time_point when_;
 
     public: