diff --git a/libavcodec/takdsp.c b/libavcodec/takdsp.c
index 9cb8052596..a8f9dba342 100644
--- a/libavcodec/takdsp.c
+++ b/libavcodec/takdsp.c
@@ -65,7 +65,7 @@ static void decorrelate_sf(int32_t *p1, int32_t *p2, int length, int dshift, int
     for (i = 0; i < length; i++) {
         int32_t a = p1[i];
         int32_t b = p2[i];
-        b         = (unsigned)(dfactor * (b >> dshift) + 128 >> 8) << dshift;
+        b         = (unsigned)((int)(dfactor * (unsigned)(b >> dshift) + 128) >> 8) << dshift;
         p1[i]     = b - a;
     }
 }