diff --git a/stopwatch.cpp b/stopwatch.cpp
index ab68712..2a62ebf 100644
--- a/stopwatch.cpp
+++ b/stopwatch.cpp
@@ -29,7 +29,9 @@ void StopWatch::updateTimer()
 //	m_timeElapsedLabel->setText(msfloatToHumanReadableString(diff.count()));
 	if (m_elapsed.isValid()) {
 		qint64 ms = m_elapsed.elapsed();
-		m_output->setText(msfloatToHumanReadableString(ms));
+		if (m_output) {
+			m_output->setText(msfloatToHumanReadableString(ms));
+		}
 
 
 		if (m_timer.isActive()) {