diff --git a/Telegram/SourceFiles/media/view/media_view_overlay_opengl.cpp b/Telegram/SourceFiles/media/view/media_view_overlay_opengl.cpp
index 576df55fb..1af0ea39b 100644
--- a/Telegram/SourceFiles/media/view/media_view_overlay_opengl.cpp
+++ b/Telegram/SourceFiles/media/view/media_view_overlay_opengl.cpp
@@ -850,6 +850,7 @@ void OverlayWidget::RendererGL::paintUsingRaster(
 	const auto size = rect.size() * _factor;
 	if (raster.width() < size.width() || raster.height() < size.height()) {
 		raster = QImage(size, QImage::Format_ARGB32_Premultiplied);
+		Assert(!raster.isNull());
 		raster.setDevicePixelRatio(_factor);
 		if (!transparent
 			&& (raster.width() > size.width()