diff --git a/libavcodec/aacdec_fixed.c b/libavcodec/aacdec_fixed.c
index 5e9249ceea..d802f3834f 100644
--- a/libavcodec/aacdec_fixed.c
+++ b/libavcodec/aacdec_fixed.c
@@ -394,7 +394,7 @@ static void apply_dependent_coupling_fixed(AACContext *ac,
                         for (k = offsets[i]; k < offsets[i + 1]; k++) {
                             tmp = (int)(((int64_t)src[group * 128 + k] * c + \
                                         (int64_t)0x1000000000) >> 37);
-                            dest[group * 128 + k] += tmp * (1 << shift);
+                            dest[group * 128 + k] += tmp * (1U << shift);
                         }
                     }
                 }