diff --git a/addons/addon-image/src/IIPHandler.ts b/addons/addon-image/src/IIPHandler.ts
index 942b243b5..e34b387c7 100644
--- a/addons/addon-image/src/IIPHandler.ts
+++ b/addons/addon-image/src/IIPHandler.ts
@@ -119,7 +119,7 @@ export class IIPHandler implements IOscHandler, IResetHandler {
         width = this._renderer.dimensions.css.canvas.width / this._coreTerminal.cols;
         height = this._renderer.dimensions.css.canvas.height / this._coreTerminal.rows;
       }
-      const scale = window ? window.devicePixelRatio : 1;
+      const scale = this._coreTerminal._core._coreBrowserService?.dpr ?? 1;
       const report = `\x1b]1337;ReportCellSize=${height.toFixed(3)};${width.toFixed(3)};${scale.toFixed(3)}\x1b\\`;
       this._coreTerminal?._core.coreService.triggerDataEvent(report);
       return true;