diff --git a/libavcodec/aacenc.c b/libavcodec/aacenc.c
index 6d66c66862..1aaaf3ac9e 100644
--- a/libavcodec/aacenc.c
+++ b/libavcodec/aacenc.c
@@ -519,7 +519,7 @@ static int aac_encode_frame(AVCodecContext *avctx,
         chans    = tag == TYPE_CPE ? 2 : 1;
         cpe      = &s->cpe[i];
         samples2 = samples + start_ch;
-        la       = samples2 + 1024 * avctx->channels + start_ch;
+        la       = samples2 + (448+64) * avctx->channels + start_ch;
         if (!data)
             la = NULL;
         for (j = 0; j < chans; j++) {