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-rw-r--r--include/ruby/ruby.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/include/ruby/ruby.h b/include/ruby/ruby.h
index a5bd28a063..a46bf95b06 100644
--- a/include/ruby/ruby.h
+++ b/include/ruby/ruby.h
@@ -692,7 +692,7 @@ VALUE rb_obj_setup(VALUE obj, VALUE klass, VALUE type);
#define RGENGC_WB_PROTECTED_STRING 0
#endif
#ifndef RGENGC_WB_PROTECTED_OBJECT
-#define RGENGC_WB_PROTECTED_OBJECT 0
+#define RGENGC_WB_PROTECTED_OBJECT 1
#endif
#ifndef RGENGC_WB_PROTECTED_FLOAT
#define RGENGC_WB_PROTECTED_FLOAT 1