diff --git a/libavcodec/dynamic_hdr_vivid.c b/libavcodec/dynamic_hdr_vivid.c
index 9847b88e61..30f7dfc71f 100644
--- a/libavcodec/dynamic_hdr_vivid.c
+++ b/libavcodec/dynamic_hdr_vivid.c
@@ -90,10 +90,7 @@ int ff_parse_itu_t_t35_to_dynamic_hdr_vivid(AVDynamicHDRVivid *s, const uint8_t
                         tm_params->base_param_k2 = get_bits(gb, 2);
                         tm_params->base_param_k3 = get_bits(gb, 4);
                         tm_params->base_param_Delta_enable_mode = get_bits(gb, 3);
-                        if (tm_params->base_param_Delta_enable_mode == 2 || tm_params->base_param_Delta_enable_mode == 6)
-                            tm_params->base_param_Delta = (AVRational){get_bits(gb, 7) * -1, base_param_Delta_den};
-                        else
-                            tm_params->base_param_Delta = (AVRational){get_bits(gb, 7), base_param_Delta_den};
+                        tm_params->base_param_Delta = (AVRational){get_bits(gb, 7), base_param_Delta_den};
 
                         if (get_bits_left(gb) < 1)
                             return AVERROR_INVALIDDATA;