--- a/mercurial/profiling.py	Fri Jun 30 03:43:57 2017 +0200
+++ b/mercurial/profiling.py	Fri Jun 30 03:44:00 2017 +0200
@@ -183,7 +183,7 @@
         profiler = encoding.environ.get('HGPROF')
         proffn = None
         if profiler is None:
-            profiler = self._ui.config('profiling', 'type', default='stat')
+            profiler = self._ui.config('profiling', 'type')
         if profiler not in ('ls', 'stat', 'flame'):
             # try load profiler from extension with the same name
             proffn = _loadprofiler(self._ui, profiler)