diff --git a/libavformat/file.c b/libavformat/file.c
index fc0af92277..c552a9eaa5 100644
--- a/libavformat/file.c
+++ b/libavformat/file.c
@@ -121,7 +121,7 @@ static int file_open(URLContext *h, const char *filename, int flags)
 static int64_t file_seek(URLContext *h, int64_t pos, int whence)
 {
     FileContext *c = h->priv_data;
-    int ret;
+    int64_t ret;
 
     if (whence == AVSEEK_SIZE) {
         struct stat st;