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-rw-r--r--include/ruby/3/arithmetic/off_t.h6
1 files changed, 5 insertions, 1 deletions
diff --git a/include/ruby/3/arithmetic/off_t.h b/include/ruby/3/arithmetic/off_t.h
index dd964b5446..03d0756257 100644
--- a/include/ruby/3/arithmetic/off_t.h
+++ b/include/ruby/3/arithmetic/off_t.h
@@ -1,4 +1,6 @@
-/** \noop-*-C++-*-vi:ft=cpp
+#ifndef RUBY3_ARITHMETIC_OFF_T_H /*-*-C++-*-vi:se ft=cpp:*/
+#define RUBY3_ARITHMETIC_OFF_T_H
+/**
* @file
* @author Ruby developers <ruby-core@ruby-lang.org>
* @copyright This file is a part of the programming language Ruby.
@@ -43,3 +45,5 @@
#else
# define NUM2OFFT RB_NUM2INT
#endif
+
+#endif /* RUBY3_ARITHMETIC_OFF_T_H */