diff --git a/src/tl/tl/tlTimer.h b/src/tl/tl/tlTimer.h
index eda1f1ac4..b25bd6105 100644
--- a/src/tl/tl/tlTimer.h
+++ b/src/tl/tl/tlTimer.h
@@ -34,12 +34,6 @@ class QDateTime;
 namespace tl
 {
 
-/**
- *  @brief Provides a ms difference between QDateTimes
- *  This function is provided to emulate QDateTime::msecsTo for Qt < 4.7
- */
-TL_PUBLIC int64_t msecs_to (const QDateTime &from, const QDateTime &to);
-
 /**
  *  @brief A basic timer class
  *
diff --git a/src/tl/unit_tests/tlFileSystemWatcher.cc b/src/tl/unit_tests/tlFileSystemWatcher.cc
index 52c871e9b..76a5c6ebe 100644
--- a/src/tl/unit_tests/tlFileSystemWatcher.cc
+++ b/src/tl/unit_tests/tlFileSystemWatcher.cc
@@ -36,8 +36,8 @@
 
 void wait_for_ms (int ms)
 {
-  QDateTime start = QDateTime::currentDateTime ();
-  while (tl::msecs_to (start, QDateTime::currentDateTime()) < ms) {
+  tl::Clock start = tl::Clock::current ();
+  while ((tl::Clock::current () - start).seconds () < ms * 0.001) {
     QCoreApplication::processEvents ();
   }
 }