diff --git a/libavcodec/libmp3lame.c b/libavcodec/libmp3lame.c
index 427cacdf8e..55657e4be2 100644
--- a/libavcodec/libmp3lame.c
+++ b/libavcodec/libmp3lame.c
@@ -234,7 +234,7 @@ static int mp3lame_encode_frame(AVCodecContext *avctx, AVPacket *avpkt,
 
     /* add current frame to the queue */
     if (frame) {
-        if ((ret = ff_af_queue_add(&s->afq, frame) < 0))
+        if ((ret = ff_af_queue_add(&s->afq, frame)) < 0)
             return ret;
     }