diff --git a/src/pcm/pcm_meter.c b/src/pcm/pcm_meter.c
index 6e3cad7a..413b3cb4 100644
--- a/src/pcm/pcm_meter.c
+++ b/src/pcm/pcm_meter.c
@@ -575,6 +575,7 @@ int snd_pcm_meter_open(snd_pcm_t **pcmp, const char *name, unsigned int frequenc
 		return err;
 	}
 	pcm->mmap_rw = 1;
+	pcm->mmap_shadow = 1;
 	pcm->ops = &snd_pcm_meter_ops;
 	pcm->fast_ops = &snd_pcm_meter_fast_ops;
 	pcm->private_data = meter;