diff --git a/libobs/obs-encoder.c b/libobs/obs-encoder.c
index 506c770f0..dc7a75af5 100644
--- a/libobs/obs-encoder.c
+++ b/libobs/obs-encoder.c
@@ -923,6 +923,11 @@ void send_off_encoder_packet(obs_encoder_t *encoder, bool success,
 			encoder->first_received = true;
 		}
 
+		/* if packet is audio, mark as keyframe if it isn't already */
+		if (pkt->type == OBS_ENCODER_AUDIO) {
+			pkt->keyframe = true;
+		}
+
 		/* we use system time here to ensure sync with other encoders,
 		 * you do not want to use relative timestamps here */
 		pkt->dts_usec = encoder->start_ts / 1000 +