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-rw-r--r--missing/os2.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/missing/os2.c b/missing/os2.c
index aeb181f..57798ab 100644
--- a/missing/os2.c
+++ b/missing/os2.c
@@ -1,3 +1,5 @@
+/* os/2 compatibility functions -- follows Ruby's lisence */
+
#include "ruby.h"
#include <stdio.h>
#include <stdlib.h>