diff --git a/libavcodec/takdec.c b/libavcodec/takdec.c
index 0e29c6283e..0b1484958e 100644
--- a/libavcodec/takdec.c
+++ b/libavcodec/takdec.c
@@ -632,7 +632,7 @@ static int decorrelate(TAKDecContext *s, int c1, int c2, int length)
         for (; length2 > 0; length2 -= tmp) {
             tmp = FFMIN(length2, x);
 
-            for (i = 0; i < tmp; i++)
+            for (i = 0; i < tmp - (tmp == length2); i++)
                 s->residues[filter_order + i] = *p2++ >> dshift;
 
             for (i = 0; i < tmp; i++) {