diff --git a/libavformat/ty.c b/libavformat/ty.c
index c8e1067c0e..c5ea4bf98d 100644
--- a/libavformat/ty.c
+++ b/libavformat/ty.c
@@ -47,7 +47,7 @@ static const uint8_t ty_AC3AudioPacket[]  = { 0x00, 0x00, 0x01, 0xbd };
 #define CHUNK_PEEK_COUNT  3      /* number of chunks to probe */
 
 typedef struct TyRecHdr {
-    int64_t   rec_size;
+    int32_t   rec_size;
     uint8_t   ex[2];
     uint8_t   rec_type;
     uint8_t   subrec_type;