diff --git a/Python/pythonrun.c b/Python/pythonrun.c
index 542fe38..a0019c4 100644
--- a/Python/pythonrun.c
+++ b/Python/pythonrun.c
@@ -295,7 +295,7 @@
 
 /* Flush stdout and stderr */
 
-void
+static void
 flush_std_files(void)
 {
 	PyObject *fout = PySys_GetObject("stdout");