diff --git a/libavcodec/adpcm.c b/libavcodec/adpcm.c
index 06dfdcc734..f37c10e0f5 100644
--- a/libavcodec/adpcm.c
+++ b/libavcodec/adpcm.c
@@ -732,7 +732,7 @@ static inline short adpcm_ms_expand_nibble(ADPCMChannelStatus *c, char nibble)
 {
     int predictor;
 
-    predictor = (((c->sample1) * (c->coeff1)) + ((c->sample2) * (c->coeff2))) / 256;
+    predictor = (((c->sample1) * (c->coeff1)) + ((c->sample2) * (c->coeff2))) / 64;
     predictor += (signed)((nibble & 0x08)?(nibble - 0x10):(nibble)) * c->idelta;
 
     c->sample2 = c->sample1;