diff --git a/libavcodec/libgsm.c b/libavcodec/libgsm.c
index eafcbec4a8..cbb284b9b0 100644
--- a/libavcodec/libgsm.c
+++ b/libavcodec/libgsm.c
@@ -100,7 +100,7 @@ static int libgsm_encode_frame(AVCodecContext *avctx, AVPacket *avpkt,
     gsm_signal *samples = (gsm_signal *)frame->data[0];
     struct gsm_state *state = avctx->priv_data;
 
-    if ((ret = ff_alloc_packet2(avctx, vpkt, avctx->block_align))) {
+    if ((ret = ff_alloc_packet2(avctx, avpkt, avctx->block_align))) {
         return ret;
     }