diff --git a/src/gl/scene/gl_scene.cpp b/src/gl/scene/gl_scene.cpp
index 8a7a882bc..a4d440abb 100644
--- a/src/gl/scene/gl_scene.cpp
+++ b/src/gl/scene/gl_scene.cpp
@@ -1138,7 +1138,7 @@ void FGLInterface::RenderTextureView (FCanvasTexture *tex, AActor *Viewpoint, in
 	gl_fixedcolormap=CM_DEFAULT;
 	gl_RenderState.SetFixedColormap(CM_DEFAULT);
 
-	bool usefb = gl_usefb || width > screen->GetWidth() || height > screen->GetHeight();
+	bool usefb = gl_usefb || gltex->GetWidth() > screen->GetWidth() || gltex->GetHeight() > screen->GetHeight();
 	if (!usefb)
 	{
 		glFlush();