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-rw-r--r--internal.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/internal.h b/internal.h
index ec61b32ae7..71c8ab6ca6 100644
--- a/internal.h
+++ b/internal.h
@@ -192,6 +192,7 @@ void Init_prelude(void);
#pragma GCC visibility push(default)
#endif
VALUE rb_thread_io_blocking_region(rb_blocking_function_t *func, void *data1, int fd);
+const char *rb_objspace_data_type_name(VALUE obj);
#if defined __GNUC__ && __GNUC__ >= 4
#pragma GCC visibility pop
#endif