diff --git a/lib/Basics/MutexLocker.cpp b/lib/Basics/MutexLocker.cpp
index 7dfd495ca6..82c3eb7cd1 100644
--- a/lib/Basics/MutexLocker.cpp
+++ b/lib/Basics/MutexLocker.cpp
@@ -40,7 +40,7 @@ using namespace arangodb::basics;
 #ifdef TRI_SHOW_LOCK_TIME
 
 MutexLocker::MutexLocker(Mutex* mutex, char const* file, int line)
-    : _mutex(mutex), isLocked(true), _isLocked(true), _file(file), _line(line), _time(0.0) {
+    : _mutex(mutex), _isLocked(true), _file(file), _line(line), _time(0.0) {
   double t = TRI_microtime();
   _mutex->lock();
   _time = TRI_microtime() - t;