--- gnuchess-5.07/src/common.h.orig	2005-05-26 13:15:05.000000000 -0400
+++ gnuchess-5.07/src/common.h	2005-05-26 13:14:33.000000000 -0400
@@ -716,7 +716,7 @@
 
 /* Input thread and thread function */
 #include <pthread.h>
-extern pthread_t input_thread;
+static pthread_t input_thread;
 void *input_func(void *);
 
 /*