diff --git a/run_nerf.py b/run_nerf.py
index bc270be86..1924f5b8d 100644
--- a/run_nerf.py
+++ b/run_nerf.py
@@ -806,7 +806,7 @@ def train():
             print('Done, saving', rgbs.shape, disps.shape)
             moviebase = os.path.join(basedir, expname, '{}_spiral_{:06d}_'.format(expname, i))
             imageio.mimwrite(moviebase + 'rgb.mp4', to8b(rgbs), fps=30, quality=8)
-            imageio.mimwrite(moviebase + 'disp.mp4', to8b(disps / np.max(disps)), fps=30, quality=8)
+            imageio.mimwrite(moviebase + 'disp.mp4', to8b(disps / np.nanmax(disps)), fps=30, quality=8)
 
             # if args.use_viewdirs:
             #     render_kwargs_test['c2w_staticcam'] = render_poses[0][:3,:4]