Index: buffer/buffer_1.c
--- buffer/buffer_1.c.orig
+++ buffer/buffer_1.c
@@ -4,7 +4,7 @@
 #include <io.h>
 #endif
 
-char buffer_1_space[BUFFER_INSIZE];
+static char buffer_1_space[BUFFER_INSIZE];
 static buffer it = BUFFER_INIT(write,1,buffer_1_space,sizeof buffer_1_space);
 buffer *buffer_1 = &it;