diff --git a/libavcodec/codec_desc.c b/libavcodec/codec_desc.c
index d912704891..efdcb59bc9 100644
--- a/libavcodec/codec_desc.c
+++ b/libavcodec/codec_desc.c
@@ -3550,7 +3550,6 @@ static const AVCodecDescriptor codec_descriptors[] = {
         .type      = AVMEDIA_TYPE_SUBTITLE,
         .name      = "arib_caption",
         .long_name = NULL_IF_CONFIG_SMALL("ARIB STD-B24 caption"),
-        .props     = AV_CODEC_PROP_TEXT_SUB,
         .profiles  = NULL_IF_CONFIG_SMALL(ff_arib_caption_profiles),
     },
 
diff --git a/libavcodec/libaribb24.c b/libavcodec/libaribb24.c
index 8ccf3c4b5d..e3e244be99 100644
--- a/libavcodec/libaribb24.c
+++ b/libavcodec/libaribb24.c
@@ -291,6 +291,7 @@ next_region:
         av_log(avctx, AV_LOG_DEBUG, "Styled ASS line: %s\n",
                buf.str);
 
+        sub->format = 1; /* text */
         ret = ff_ass_add_rect(sub, buf.str, b24->read_order++,
                               0, NULL, NULL);
     }