diff --git a/3rdparty/qtimgui/QtImGui.cpp b/3rdparty/qtimgui/QtImGui.cpp
index 6f5b0480..2c0df89f 100644
--- a/3rdparty/qtimgui/QtImGui.cpp
+++ b/3rdparty/qtimgui/QtImGui.cpp
@@ -21,7 +21,11 @@ public:
         return w->size();
     }
     qreal devicePixelRatio() const override {
+#if defined(__APPLE__)
         return w->devicePixelRatio();
+#else
+        return w->devicePixelRatioF();
+#endif
     }
     bool isActive() const override {
         return w->isActiveWindow();
diff --git a/gui/fpgaviewwidget.cc b/gui/fpgaviewwidget.cc
index 9c90e2c5..5d37a138 100644
--- a/gui/fpgaviewwidget.cc
+++ b/gui/fpgaviewwidget.cc
@@ -27,6 +27,7 @@
 #include <QImageWriter>
 #include <QMouseEvent>
 #include <QWidget>
+#include <QDesktopWidget>
 
 #include "QtImGui.h"
 #include "imgui.h"
@@ -287,7 +288,11 @@ QMatrix4x4 FPGAViewWidget::getProjection(void)
 void FPGAViewWidget::paintGL()
 {
     auto gl = QOpenGLContext::currentContext()->functions();
+#if defined(__APPLE__)
     const qreal retinaScale = devicePixelRatio();
+#else
+    const qreal retinaScale = devicePixelRatioF();
+#endif
     gl->glViewport(0, 0, width() * retinaScale, height() * retinaScale);
     gl->glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
 
@@ -807,12 +812,10 @@ void FPGAViewWidget::mouseMoveEvent(QMouseEvent *event)
 // coordinates.
 QVector4D FPGAViewWidget::mouseToWorldCoordinates(int x, int y)
 {
-    const qreal retinaScale = devicePixelRatio();
-
     auto projection = getProjection();
 
     QMatrix4x4 vp;
-    vp.viewport(0, 0, width() * retinaScale, height() * retinaScale);
+    vp.viewport(0, 0, width(), height());
 
     QVector4D vec(x, y, 1, 1);
     vec = vp.inverted() * vec;