diff --git a/libcelt/pitch.c b/libcelt/pitch.c
index bff5c70b..e7d2e6ae 100644
--- a/libcelt/pitch.c
+++ b/libcelt/pitch.c
@@ -112,7 +112,7 @@ void pitch_downsample(celt_sig * restrict x[], celt_word16 * restrict x_lp, int
    if (C==2)
    {
       for (i=1;i<len>>1;i++)
-      x_lp[i] = SHR32(HALF32(HALF32(x[1][(2*i-1)]+x[1][(2*i+1)])+x[1][2*i]), SIG_SHIFT+2);
+         x_lp[i] += SHR32(HALF32(HALF32(x[1][(2*i-1)]+x[1][(2*i+1)])+x[1][2*i]), SIG_SHIFT+2);
       x_lp[0] += SHR32(HALF32(HALF32(x[1][1])+x[1][0]), SIG_SHIFT+2);
       *xmem += x[1][end-1];
    }