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-rw-r--r--internal.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/internal.h b/internal.h
index 57b485d74f..c091a1c49e 100644
--- a/internal.h
+++ b/internal.h
@@ -247,7 +247,7 @@ struct timeval rb_time_timeval(VALUE);
/* thread.c */
VALUE rb_obj_is_mutex(VALUE obj);
-VALUE ruby_suppress_tracing(VALUE (*func)(VALUE, int), VALUE arg, int always);
+VALUE rb_suppress_tracing(VALUE (*func)(VALUE), VALUE arg);
void rb_thread_execute_interrupts(VALUE th);
void rb_clear_trace_func(void);
VALUE rb_get_coverages(void);