diff --git a/libavcodec/utils.c b/libavcodec/utils.c
index bb99a5a32d..836d95388d 100644
--- a/libavcodec/utils.c
+++ b/libavcodec/utils.c
@@ -1073,7 +1073,7 @@ int attribute_align_arg avcodec_encode_audio(AVCodecContext *avctx,
                                              const short *samples)
 {
     AVPacket pkt;
-    AVFrame frame0;
+    AVFrame frame0 = { 0 };
     AVFrame *frame;
     int ret, samples_size, got_packet;