diff --git a/libavformat/segafilm.c b/libavformat/segafilm.c
index 818c0d3d82..3d1b48bbfa 100644
--- a/libavformat/segafilm.c
+++ b/libavformat/segafilm.c
@@ -46,7 +46,7 @@
 
 typedef struct {
   int stream;
-  off_t sample_offset;
+  offset_t sample_offset;
   unsigned int sample_size;
   int64_t pts;
   int keyframe;