Cleanup for GCC-4.x
diff --git a/board/esd/adciop/adciop.c b/board/esd/adciop/adciop.c
index 93bc843..7a11a12 100644
--- a/board/esd/adciop/adciop.c
+++ b/board/esd/adciop/adciop.c
@@ -60,7 +60,7 @@
 
 int checkboard (void)
 {
-	unsigned char str[64];
+	char str[64];
 	int i = getenv_r ("serial#", str, sizeof (str));
 
 	puts ("Board: ");