diff --git a/sound/core/seq/seq_memory.c b/sound/core/seq/seq_memory.c
index ca9f6db0022c..209b08c2a940 100644
--- a/sound/core/seq/seq_memory.c
+++ b/sound/core/seq/seq_memory.c
@@ -364,7 +364,7 @@ int snd_seq_event_dup(struct snd_seq_pool *pool, struct snd_seq_event *event,
 	size = snd_seq_event_packet_size(event);
 	memcpy(&cell->ump, event, size);
 #if IS_ENABLED(CONFIG_SND_SEQ_UMP)
-	if (size < sizeof(cell->event))
+	if (size < sizeof(cell->ump))
 		cell->ump.raw.extra = 0;
 #endif