diff --git a/modules/desktop_capture/desktop_frame.cc b/modules/desktop_capture/desktop_frame.cc
index 2758ffa59e..eaee0aa26d 100644
--- a/modules/desktop_capture/desktop_frame.cc
+++ b/modules/desktop_capture/desktop_frame.cc
@@ -69,8 +69,13 @@ DesktopRect DesktopFrame::rect() const {
 
 float DesktopFrame::scale_factor() const {
   float scale = 1.0f;
+
+#if defined(WEBRTC_MAC)
+  // At least on Windows the logical and physical pixel are the same
+  // See http://crbug.com/948362.
   if (!dpi().is_zero() && dpi().x() == dpi().y())
     scale = dpi().x() / kStandardDPI;
+#endif
 
   return scale;
 }
diff --git a/modules/desktop_capture/desktop_frame.h b/modules/desktop_capture/desktop_frame.h
index 5c595a58e1..ef5ed7226f 100644
--- a/modules/desktop_capture/desktop_frame.h
+++ b/modules/desktop_capture/desktop_frame.h
@@ -22,7 +22,7 @@
 
 namespace webrtc {
 
-const int kStandardDPI = 96;
+const float kStandardDPI = 96.0f;
 
 // DesktopFrame represents a video frame captured from the screen.
 class RTC_EXPORT DesktopFrame {