diff --git a/libavcodec/cbs_av1.c b/libavcodec/cbs_av1.c
index 02f168b58d..f02cca2dad 100644
--- a/libavcodec/cbs_av1.c
+++ b/libavcodec/cbs_av1.c
@@ -956,7 +956,7 @@ static int cbs_av1_read_unit(CodedBitstreamContext *ctx,
 
     if (obu->header.obu_extension_flag) {
         priv->temporal_id = obu->header.temporal_id;
-        priv->spatial_id  = obu->header.temporal_id;
+        priv->spatial_id  = obu->header.spatial_id;
 
         if (obu->header.obu_type != AV1_OBU_SEQUENCE_HEADER &&
             obu->header.obu_type != AV1_OBU_TEMPORAL_DELIMITER &&