diff --git a/spa/plugins/alsa/alsa-utils.c b/spa/plugins/alsa/alsa-utils.c
index c4eab5d36..23112ee3e 100644
--- a/spa/plugins/alsa/alsa-utils.c
+++ b/spa/plugins/alsa/alsa-utils.c
@@ -315,6 +315,7 @@ spa_alsa_enum_format(struct state *state, uint32_t *index,
 
 		if (maps[*index] == NULL) {
 			res = 0;
+			snd_pcm_free_chmaps(maps);
 			goto exit;
 		}
 		map = &maps[*index]->map;