diff --git a/libavformat/mpegts.c b/libavformat/mpegts.c
index 3a5cb769ba..c66a1ea6ed 100644
--- a/libavformat/mpegts.c
+++ b/libavformat/mpegts.c
@@ -2189,7 +2189,7 @@ int ff_parse_mpeg2_descriptor(AVFormatContext *fc, AVStream *st, int stream_type
             uint32_t buf;
             AVDOVIDecoderConfigurationRecord *dovi;
             size_t dovi_size;
-            int dependency_pid;
+            int dependency_pid = -1; // Unset
 
             if (desc_end - *pp < 4) // (8 + 8 + 7 + 6 + 1 + 1 + 1) / 8
                 return AVERROR_INVALIDDATA;