diff --git a/libavcodec/takdec.c b/libavcodec/takdec.c
index 260032561e..b01f55ca65 100644
--- a/libavcodec/takdec.c
+++ b/libavcodec/takdec.c
@@ -855,7 +855,7 @@ static int tak_decode_frame(AVCodecContext *avctx, void *data,
 
             if (s->sample_shift[chan] > 0)
                 for (i = 0; i < s->nb_samples; i++)
-                    decoded[i] *= 1 << s->sample_shift[chan];
+                    decoded[i] *= 1U << s->sample_shift[chan];
         }
     }
 
@@ -897,7 +897,7 @@ static int tak_decode_frame(AVCodecContext *avctx, void *data,
         for (chan = 0; chan < avctx->channels; chan++) {
             int32_t *samples = (int32_t *)frame->extended_data[chan];
             for (i = 0; i < s->nb_samples; i++)
-                samples[i] *= 1 << 8;
+                samples[i] *= 1U << 8;
         }
         break;
     }