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-rw-r--r--include/ruby/io/buffer.h6
1 files changed, 3 insertions, 3 deletions
diff --git a/include/ruby/io/buffer.h b/include/ruby/io/buffer.h
index bb83fe0be6..16b23ec629 100644
--- a/include/ruby/io/buffer.h
+++ b/include/ruby/io/buffer.h
@@ -1,5 +1,5 @@
-#ifndef RUBY_IO_BUFFER_T
-#define RUBY_IO_BUFFER_T 1
+#ifndef RUBY_IO_BUFFER_H
+#define RUBY_IO_BUFFER_H
/**
* @file
* @author Samuel Williams
@@ -88,4 +88,4 @@ VALUE rb_io_buffer_pwrite(VALUE self, VALUE io, size_t length, rb_off_t offset);
RBIMPL_SYMBOL_EXPORT_END()
-#endif /* RUBY_IO_BUFFER_T */
+#endif /* RUBY_IO_BUFFER_H */