diff --git a/libavcodec/apedec.c b/libavcodec/apedec.c
index 8fe7b5ee86..388d851d03 100644
--- a/libavcodec/apedec.c
+++ b/libavcodec/apedec.c
@@ -1333,7 +1333,7 @@ static void do_apply_filter(APEContext *ctx, int version, APEFilter *f,
             /* Version 3.98 and later files */
 
             /* Update the adaption coefficients */
-            absres = FFABS(res);
+            absres = FFABSU(res);
             if (absres)
                 *f->adaptcoeffs = APESIGN(res) *
                                   (8 << ((absres > f->avg * 3) + (absres > f->avg * 4 / 3)));