diff --git a/internal/driver/glfw/window_desktop.go b/internal/driver/glfw/window_desktop.go
index 21452ee897..9e34404217 100644
--- a/internal/driver/glfw/window_desktop.go
+++ b/internal/driver/glfw/window_desktop.go
@@ -307,14 +307,17 @@ func (w *window) getMonitorForWindow() *glfw.Monitor {
 
 func (w *window) detectScale() float32 {
 	if build.IsWayland { // Wayland controls scale through content scaling
-		return 1.0
+		return 1
 	}
 	monitor := w.getMonitorForWindow()
 	if monitor == nil {
-		return 1.0
+		return 1
 	}
 
-	widthMm, _ := monitor.GetPhysicalSize()
+	widthMm, heightMm := monitor.GetPhysicalSize()
+	if runtime.GOOS == "linux" && widthMm == 60 && heightMm == 60 { // Steam Deck incorrectly reports 6cm square!
+		return 1
+	}
 	widthPx := monitor.GetVideoMode().Width
 
 	return calculateDetectedScale(widthMm, widthPx)