1 files changed, 1 insertions, 1 deletions
diff --git a/file.c b/file.c
index 30c07e0065..610d9a22dc 100644
--- a/file.c
+++ b/file.c
@@ -2901,7 +2901,7 @@ rb_file_truncate(obj, len)
 #  define LOCK_UN 8
 # endif
 
-#if 0
+#if 1
 static int
 rb_thread_flock(fd, op, fptr)
     int fd, op;