diff --git a/sound/core/ump.c b/sound/core/ump.c
index b325fcfa77d0..0f0d7e895c5a 100644
--- a/sound/core/ump.c
+++ b/sound/core/ump.c
@@ -733,6 +733,12 @@ static void fill_fb_info(struct snd_ump_endpoint *ump,
 		info->block_id, info->direction, info->active,
 		info->first_group, info->num_groups, info->midi_ci_version,
 		info->sysex8_streams, info->flags);
+
+	if ((info->flags & SNDRV_UMP_BLOCK_IS_MIDI1) && info->num_groups != 1) {
+		info->num_groups = 1;
+		ump_dbg(ump, "FB %d: corrected groups to 1 for MIDI1\n",
+			info->block_id);
+	}
 }
 
 /* check whether the FB info gets updated by the current message */