diff --git a/spa/plugins/alsa/alsa-utils.c b/spa/plugins/alsa/alsa-utils.c
index 3b8f4ac63..dd3594613 100644
--- a/spa/plugins/alsa/alsa-utils.c
+++ b/spa/plugins/alsa/alsa-utils.c
@@ -406,6 +406,7 @@ pull_frames(struct state *state,
 		}
 		total_frames += n_frames;
 		to_write -= n_frames;
+		offset += n_frames;
 
 		spa_log_trace(state->log, "alsa-util %p: written %lu frames, left %ld",
 				state, total_frames, to_write);