diff --git a/libs/ui/opengl/kis_opengl_canvas2.cpp b/libs/ui/opengl/kis_opengl_canvas2.cpp
index 076b4955e8..39d940d31e 100644
--- a/libs/ui/opengl/kis_opengl_canvas2.cpp
+++ b/libs/ui/opengl/kis_opengl_canvas2.cpp
@@ -43,6 +43,7 @@
 #include <QOpenGLVertexArrayObject>
 #include <QOpenGLBuffer>
 #include <QMessageBox>
+#include <QGuiApplication>
 
 #ifndef Q_OS_OSX
 #include <QOpenGLFunctions_2_1>
@@ -658,7 +659,7 @@ void KisOpenGLCanvas2::drawImage()
 
     qreal scaleX, scaleY;
     converter->imageScale(&scaleX, &scaleY);
-    d->displayShader->setUniformValue(d->displayShader->location(Uniform::ViewportScale), (GLfloat) scaleX);
+    d->displayShader->setUniformValue(d->displayShader->location(Uniform::ViewportScale), (GLfloat) (scaleX * devicePixelRatioF()));
     d->displayShader->setUniformValue(d->displayShader->location(Uniform::TexelSize), (GLfloat) d->openGLImageTextures->texelSize());
 
     QRect ir = d->openGLImageTextures->storedImageBounds();