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-rw-r--r--ext/stringio/stringio.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/ext/stringio/stringio.c b/ext/stringio/stringio.c
index d5753a97a0..43ce0d6a8a 100644
--- a/ext/stringio/stringio.c
+++ b/ext/stringio/stringio.c
@@ -12,7 +12,8 @@
**********************************************************************/
-#define STRINGIO_VERSION "3.0.9"
+static const char *const
+STRINGIO_VERSION = "3.0.9";
#include "ruby.h"
#include "ruby/io.h"