diff --git a/compat/mingw.c b/compat/mingw.c
index f3423275f0..77176cd65f 100644
--- a/compat/mingw.c
+++ b/compat/mingw.c
@@ -3114,6 +3114,7 @@ int msc_startup(int argc, wchar_t **w_argv, wchar_t **w_env)
 	_CrtSetDbgFlag(_CRTDBG_ALLOC_MEM_DF | _CRTDBG_LEAK_CHECK_DF);
 #endif
 
+	fsync_object_files = 1;
 	maybe_redirect_std_handles();
 
 	/* determine size of argv conversion buffer */
@@ -3180,6 +3181,7 @@ void mingw_startup(void)
 	wchar_t **wenv, **wargv;
 	_startupinfo si;
 
+	fsync_object_files = 1;
 	maybe_redirect_std_handles();
 
 	/* get wide char arguments and environment */