diff --git a/libavutil/random_seed.c b/libavutil/random_seed.c
index a2b388549c..b9222fc3ac 100644
--- a/libavutil/random_seed.c
+++ b/libavutil/random_seed.c
@@ -31,9 +31,6 @@ static int read_random(uint32_t *dst, const char *file)
 
     if (fd == -1)
         return -1;
-#if HAVE_FCNTL && defined(O_NONBLOCK)
-    if (fcntl(fd, F_SETFL, fcntl(fd, F_GETFL) | O_NONBLOCK) != -1)
-#endif
         err = read(fd, dst, sizeof(*dst));
     close(fd);