1 files changed, 0 insertions, 1 deletions
diff --git a/io.c b/io.c
index 943afa6e51..637dfeae3e 100644
--- a/io.c
+++ b/io.c
@@ -775,7 +775,6 @@ rb_io_fsync(io)
     FILE *f;
 
     GetOpenFile(io, fptr);
-    rb_io_check_writable(fptr);
     f = GetWriteFile(fptr);
 
     io_fflush(f, fptr);