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-rw-r--r--thread.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/thread.c b/thread.c
index f5efe40..b84fd17 100644
--- a/thread.c
+++ b/thread.c
@@ -309,7 +309,7 @@ static int rb_thread_debug_enabled;
*/
static VALUE
-rb_thread_s_debug(void)
+rb_thread_s_debug(VALUE _)
{
return INT2NUM(rb_thread_debug_enabled);
}