diff --git a/racket/src/racket/src/print.c b/racket/src/racket/src/print.c
index efc1a1df30..e0cb524dea 100644
--- a/racket/src/racket/src/print.c
+++ b/racket/src/racket/src/print.c
@@ -263,7 +263,7 @@ void
 scheme_debug_print (Scheme_Object *obj)
 {
   scheme_write(obj, scheme_orig_stdout_port);
-  fflush (stdout);
+  scheme_flush_output(scheme_orig_stdout_port);
 }
 
 static void *print_to_port_k(void)