diff --git a/libavcodec/encode.c b/libavcodec/encode.c
index dd25cf999b..5575cf23db 100644
--- a/libavcodec/encode.c
+++ b/libavcodec/encode.c
@@ -366,7 +366,7 @@ int attribute_align_arg avcodec_send_frame(AVCodecContext *avctx, const AVFrame
     if (avci->draining)
         return AVERROR_EOF;
 
-    if (avci->buffer_frame->data[0])
+    if (avci->buffer_frame->buf[0])
         return AVERROR(EAGAIN);
 
     if (!frame) {