diff --git a/libavcodec/adpcm.c b/libavcodec/adpcm.c
index c69cac3379..4f5980f7d5 100644
--- a/libavcodec/adpcm.c
+++ b/libavcodec/adpcm.c
@@ -1898,7 +1898,7 @@ static int adpcm_decode_frame(AVCodecContext *avctx, void *data,
                             scale = sign_extend(byte, 4);
                         }
 
-                        scale  = scale << 12;
+                        scale  = scale * (1 << 12);
                         sample = (int)((scale >> shift) + (c->status[channel].sample1 * xa_adpcm_table[filter][0] + c->status[channel].sample2 * xa_adpcm_table[filter][1]) / 64);
                     }
                     *samples++ = av_clip_int16(sample);