diff --git a/internal/ui/monitor_glfw.go b/internal/ui/monitor_glfw.go
index c2edabe03..9c80a95e0 100644
--- a/internal/ui/monitor_glfw.go
+++ b/internal/ui/monitor_glfw.go
@@ -40,13 +40,7 @@ type Monitor struct {
 
 // Bounds returns the monitor's bounds.
 func (m *Monitor) Bounds() image.Rectangle {
-	ui := Get()
-	return image.Rect(
-		int(ui.dipFromGLFWMonitorPixel(float64(m.x), m.m)),
-		int(ui.dipFromGLFWMonitorPixel(float64(m.y), m.m)),
-		int(ui.dipFromGLFWMonitorPixel(float64(m.x+m.width), m.m)),
-		int(ui.dipFromGLFWMonitorPixel(float64(m.x+m.height), m.m)),
-	)
+	return image.Rect(m.x, m.y, m.x+m.width, m.y+m.height)
 }
 
 // Name returns the monitor's name.
diff --git a/monitor.go b/monitor.go
index 35c6bd03c..49e6bf247 100644
--- a/monitor.go
+++ b/monitor.go
@@ -23,7 +23,8 @@ import (
 // MonitorType represents a monitor available to the system.
 type MonitorType ui.Monitor
 
-// Bounds returns the position and size of the monitor in device-independent pixels.
+// Bounds returns the position and size of the monitor in pixels.
+// Be careful that the unit is not device-independent pixels.
 func (m *MonitorType) Bounds() image.Rectangle {
 	return (*ui.Monitor)(m).Bounds()
 }