diff --git a/src/Gui/MouseSelection.cpp b/src/Gui/MouseSelection.cpp
index e5aff0d1e8..5929b5e5fd 100644
--- a/src/Gui/MouseSelection.cpp
+++ b/src/Gui/MouseSelection.cpp
@@ -390,7 +390,7 @@ int PolyPickerSelection::locationEvent(const SoLocation2Event* const, const QPoi
 
     if (polyline.isWorking()) {
         // check the position
-#if QT_VERSION >= 0x050000
+#if QT_VERSION >= 0x050600
         qreal dpr = _pcView3D->getGLWidget()->devicePixelRatioF();
 #else
         qreal dpr = 1.0;
@@ -608,7 +608,7 @@ int FreehandSelection::locationEvent(const SoLocation2Event* const e, const QPoi
 
     if (polyline.isWorking()) {
         // check the position
-#if QT_VERSION >= 0x050000
+#if QT_VERSION >= 0x050600
         qreal dpr = _pcView3D->getGLWidget()->devicePixelRatioF();
 #else
         qreal dpr = 1.0;
diff --git a/src/Mod/Sketcher/Gui/ViewProviderSketch.cpp b/src/Mod/Sketcher/Gui/ViewProviderSketch.cpp
index 44bfd7368f..d6acce8812 100644
--- a/src/Mod/Sketcher/Gui/ViewProviderSketch.cpp
+++ b/src/Mod/Sketcher/Gui/ViewProviderSketch.cpp
@@ -1196,7 +1196,7 @@ bool ViewProviderSketch::mouseMove(const SbVec2s &cursorPos, Gui::View3DInventor
         }
         case STATUS_SKETCH_UseRubberBand: {
             // Here we must use the device-pixel-ratio to compute the correct y coordinate (#0003130)
-#if QT_VERSION >= 0x050000
+#if QT_VERSION >= 0x050600
             qreal dpr = viewer->getGLWidget()->devicePixelRatioF();
 #else
             qreal dpr = 1;