diff -uprN mono-5.8.0.108.old/mono/metadata/threads.c mono-5.8.0.108/mono/metadata/threads.c
--- mono-5.8.0.108.old/mono/metadata/threads.c	2018-01-19 18:09:55.000000000 +0300
+++ mono-5.8.0.108/mono/metadata/threads.c	2018-02-03 01:53:45.151973092 +0300
@@ -1863,7 +1863,7 @@ ves_icall_System_Threading_Thread_Join_i
 
 		/* Wait for the thread to really exit */
 		MonoNativeThreadId tid = thread_get_tid (thread);
-		mono_thread_join (tid);
+		mono_thread_join ((gpointer)tid);
 
 		return TRUE;
 	}