diff --git a/libavformat/mxfdec.c b/libavformat/mxfdec.c
index 7bcc3957b4..cad07fe6e6 100644
--- a/libavformat/mxfdec.c
+++ b/libavformat/mxfdec.c
@@ -197,7 +197,7 @@ typedef struct MXFDescriptor {
 typedef struct MXFIndexTableSegment {
     UID uid;
     enum MXFMetadataSetType type;
-    int edit_unit_byte_count;
+    unsigned edit_unit_byte_count;
     int index_sid;
     int body_sid;
     AVRational index_edit_rate;