diff --git a/compat/mingw.c b/compat/mingw.c
index 5c9738ec3b..9c0e8b4cb3 100644
--- a/compat/mingw.c
+++ b/compat/mingw.c
@@ -18,6 +18,7 @@
 #include "gettext.h"
 #define SECURITY_WIN32
 #include <sspi.h>
+#include "../write-or-die.h"
 #include "../repository.h"
 
 #define HCAST(type, handle) ((type)(intptr_t)handle)
@@ -3063,6 +3064,7 @@ int wmain(int argc, const wchar_t **wargv)
 #endif
 
 	maybe_redirect_std_handles();
+	fsync_object_files = 1;
 
 	/* determine size of argv and environ conversion buffer */
 	maxlen = wcslen(wargv[0]);