diff --git a/libgeneric-pc/audio.cpp b/libgeneric-pc/audio.cpp
index ce13a9b..3c01199 100644
--- a/libgeneric-pc/audio.cpp
+++ b/libgeneric-pc/audio.cpp
@@ -472,7 +472,8 @@ void cAudio::run()
 			hal_debug("%s: pts 0x%" PRIx64 " %3f\n", __func__, curr_pts, curr_pts/90000.0);
 			int o_buf_sz = av_samples_get_buffer_size(&out_linesize, o_ch,
 								  obuf_sz, AV_SAMPLE_FMT_S16, 1);
-			ao_play(adevice, (char *)obuf, o_buf_sz);
+			if (o_buf_sz > 0)
+				ao_play(adevice, (char *)obuf, o_buf_sz);
 		}
 		av_packet_unref(&avpkt);
 	}