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-rw-r--r--win32/file.c4
1 files changed, 4 insertions, 0 deletions
diff --git a/win32/file.c b/win32/file.c
index 13325a3d08..955f91bc67 100644
--- a/win32/file.c
+++ b/win32/file.c
@@ -1,6 +1,10 @@
#include "ruby/ruby.h"
#include <winbase.h>
+#ifndef INVALID_FILE_ATTRIBUTES
+# define INVALID_FILE_ATTRIBUTES ((DWORD)-1)
+#endif
+
int
rb_file_load_ok(const char *path)
{