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-rw-r--r--include/ruby/intern.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/include/ruby/intern.h b/include/ruby/intern.h
index 28d59d0cd6..1a034508ea 100644
--- a/include/ruby/intern.h
+++ b/include/ruby/intern.h
@@ -309,7 +309,7 @@ void rb_exec_end_proc(void);
void Init_jump(void);
void ruby_finalize(void);
NORETURN(void ruby_stop(int));
-int ruby_cleanup(int);
+int ruby_cleanup(volatile int);
void rb_gc_mark_threads(void);
void rb_thread_schedule(void);
void rb_thread_wait_fd(int);