diff --git a/libavcodec/apedec.c b/libavcodec/apedec.c
index 70939abeb4..5d82ff53ff 100644
--- a/libavcodec/apedec.c
+++ b/libavcodec/apedec.c
@@ -828,7 +828,7 @@ static av_always_inline int filter_fast_3320(APEPredictor *p,
         return decoded;
     }
 
-    predictionA = p->buf[delayA] * 2 - p->buf[delayA - 1];
+    predictionA = p->buf[delayA] * 2U - p->buf[delayA - 1];
     p->lastA[filter] = decoded + ((int32_t)(predictionA  * p->coeffsA[filter][0]) >> 9);
 
     if ((decoded ^ predictionA) > 0)