diff --git a/libavcodec/nellymoserdec.c b/libavcodec/nellymoserdec.c
index 8a829b3f3a..fc57f2d61f 100644
--- a/libavcodec/nellymoserdec.c
+++ b/libavcodec/nellymoserdec.c
@@ -119,9 +119,8 @@ static void overlap_and_window(NellyMoserDecodeContext *s, float *state, float *
     bot = 0;
     top = NELLY_BUF_LEN-1;
 
-    while (bot < NELLY_BUF_LEN/2) {
+    while (bot < NELLY_BUF_LEN) {
         audio[bot] = ( a_in[bot]*sine_window[bot]+state[bot]*sine_window[top])/s->scale_bias + s->add_bias;
-        audio[top] = ( a_in[top]*sine_window[top]+state[top]*sine_window[bot])/s->scale_bias + s->add_bias;
 
         bot++;
         top--;