diff --git a/src/clock.hh b/src/clock.hh
index 741c049c..b4138de0 100644
--- a/src/clock.hh
+++ b/src/clock.hh
@@ -8,7 +8,6 @@ namespace Kakoune
 
 using Clock = std::chrono::steady_clock;
 using TimePoint = Clock::time_point;
-using DurationMs = std::chrono::milliseconds;
 
 }
 
diff --git a/src/main.cc b/src/main.cc
index 3ede4f1c..76e33576 100644
--- a/src/main.cc
+++ b/src/main.cc
@@ -658,8 +658,11 @@ int run_server(StringView session, StringView server_init,
     UnitTest::run_all_tests();
 
     if (debug_flags & DebugFlags::Profile)
+    {
+        using namespace std::chrono;
         write_to_debug_buffer(format("running the unit tests took {} ms",
-            std::chrono::duration_cast<DurationMs>(Clock::now() - start_time).count()));
+                                     duration_cast<milliseconds>(Clock::now() - start_time).count()));
+    }
 
     GlobalScope::instance().options().get_local_option("readonly").set<bool>(flags & ServerFlags::ReadOnly);