2 files changed, 6 insertions, 4 deletions
diff --git a/fastos/src/vespa/fastos/timestamp.cpp b/fastos/src/vespa/fastos/timestamp.cpp
index 8f8480d09ab..de234a988cd 100644
--- a/fastos/src/vespa/fastos/timestamp.cpp
+++ b/fastos/src/vespa/fastos/timestamp.cpp
@@ -63,15 +63,17 @@ ClockSteady::now()
     return steady_now();
 }
 
-void
+StopWatch &
 StopWatch::start() {
     _startTime = steady_now();
     _stopTime = _startTime;
+    return *this;
 }
 
-void
+StopWatch &
 StopWatch::stop()  {
     _stopTime = steady_now();
+    return *this;
 }
 
 }
diff --git a/fastos/src/vespa/fastos/timestamp.h b/fastos/src/vespa/fastos/timestamp.h
index 21ef9d6df75..300875ed4b8 100644
--- a/fastos/src/vespa/fastos/timestamp.h
+++ b/fastos/src/vespa/fastos/timestamp.h
@@ -72,8 +72,8 @@ class StopWatch
 public:
     StopWatch() : _startTime(), _stopTime() { }
 
-    void start();
-    void stop();
+    StopWatch & start();
+    StopWatch & stop();
 
     TimeStamp startTime() const { return _startTime; }