Cleanup for GCC-4.x
diff --git a/board/esd/hub405/hub405.c b/board/esd/hub405/hub405.c
index bbd8555..e77dba8 100644
--- a/board/esd/hub405/hub405.c
+++ b/board/esd/hub405/hub405.c
@@ -210,7 +210,7 @@
 {
 	DECLARE_GLOBAL_DATA_PTR;
 
-	unsigned char str[64];
+	char str[64];
 	int i = getenv_r ("serial#", str, sizeof(str));
 
 	puts ("Board: ");