diff --git a/gui/fpgaviewwidget.cc b/gui/fpgaviewwidget.cc
index 86aae25d..9343419b 100644
--- a/gui/fpgaviewwidget.cc
+++ b/gui/fpgaviewwidget.cc
@@ -277,11 +277,11 @@ FPGAViewWidget::FPGAViewWidget(QWidget *parent)
     }
 
     connect(&paintTimer_, SIGNAL(timeout()), this, SLOT(update()));
-    paintTimer_.start(std::chrono::duration<int, std::milli>(1000 / 20)); // paint GL 20 times per second
+    paintTimer_.start(1000 / 20); // paint GL 20 times per second
 
     renderRunner_ = std::unique_ptr<PeriodicRunner>(new PeriodicRunner(this, [this] { renderLines(); }));
     renderRunner_->start();
-    renderRunner_->startTimer(std::chrono::duration<int, std::milli>(1000 / 2)); // render line 2 times per second
+    renderRunner_->startTimer(1000 / 2); // render lines 2 times per second
 }
 
 FPGAViewWidget::~FPGAViewWidget() {}
diff --git a/gui/fpgaviewwidget.h b/gui/fpgaviewwidget.h
index 0d0ef89c..b87c5d0a 100644
--- a/gui/fpgaviewwidget.h
+++ b/gui/fpgaviewwidget.h
@@ -244,7 +244,7 @@ class PeriodicRunner : public QThread
         }
     }
 
-    void startTimer(std::chrono::milliseconds value) { timer_.start(value); }
+    void startTimer(int msecs) { timer_.start(msecs); }
 
     ~PeriodicRunner()
     {