1 files changed, 2 insertions, 2 deletions
diff --git a/process.c b/process.c
index 9970383748..ca37d87291 100644
--- a/process.c
+++ b/process.c
@@ -1349,8 +1349,8 @@ rb_fork(status, chfunc, charg)
 #endif
 
 #ifndef __VMS
-    fflush(stdout);
-    fflush(stderr);
+    rb_io_flush(rb_stdout);
+    rb_io_flush(rb_stderr);
 #endif
 
 #ifdef FD_CLOEXEC