diff --git a/src/qt/modaloverlay.cpp b/src/qt/modaloverlay.cpp
index 7254a615e..f3a28fc55 100644
--- a/src/qt/modaloverlay.cpp
+++ b/src/qt/modaloverlay.cpp
@@ -106,8 +106,9 @@ void ModalOverlay::tipUpdate(int count, const QDateTime& blockDate, double nVeri
         // show progress increase per hour
         ui->progressIncreasePerH->setText(QString::number(progressPerHour > 0 ? progressPerHour*100 : 0, 'f', 2)+"%");
 
-        // show expected remaining time
-        ui->expectedTimeLeft->setText(GUIUtil::formatNiceTimeOffset(remainingMSecs/1000.0));
+        // show expected remaining time, if we have a sample
+        if (remainingMSecs > 0)
+            ui->expectedTimeLeft->setText(GUIUtil::formatNiceTimeOffset(remainingMSecs/1000.0));
 
         static const int MAX_SAMPLES = 5000;
         if (blockProcessTime.count() > MAX_SAMPLES)
@@ -126,7 +127,7 @@ void ModalOverlay::tipUpdate(int count, const QDateTime& blockDate, double nVeri
         return;
 
     // estimate the number of headers left based on nPowTargetSpacing
-    // and check if the gui is not aware of the the best header (happens rarely)
+    // and check if the GUI is not aware of the best header (happens rarely)
     int estimateNumHeadersLeft = bestHeaderDate.secsTo(currentDate) / Params().GetConsensus(bestHeaderHeight).nPowTargetSpacing;
     bool hasBestHeader = bestHeaderHeight >= count;