diff --git a/libavformat/utils.c b/libavformat/utils.c
index 72a3d5eeae..1c5614f874 100644
--- a/libavformat/utils.c
+++ b/libavformat/utils.c
@@ -2155,7 +2155,7 @@ static void estimate_timings_from_bit_rate(AVFormatContext *ic)
     }
 }
 
-#define DURATION_MAX_READ_SIZE 250000
+#define DURATION_MAX_READ_SIZE 250000LL
 #define DURATION_MAX_RETRY 4
 
 /* only usable for MPEG-PS streams */