diff --git a/libavformat/matroskadec.c b/libavformat/matroskadec.c
index de14ff96b8..b303d534aa 100644
--- a/libavformat/matroskadec.c
+++ b/libavformat/matroskadec.c
@@ -3973,7 +3973,7 @@ static int matroska_parse_block_additional(MatroskaDemuxContext *matroska,
                     break; // ignore
 
                 hdr_smpte_2094_app5 = av_dynamic_hdr_smpte2094_app5_alloc(&hdr_smpte_2094_app5_size);
-                if (!hdr_smpte_2094_app5_size)
+                if (!hdr_smpte_2094_app5)
                     return AVERROR(ENOMEM);
 
                 if ((res = av_dynamic_hdr_smpte2094_app5_from_t35(hdr_smpte_2094_app5,