diff --git a/board/g2000/g2000.c b/board/g2000/g2000.c
index 5967e90..3f78753 100644
--- a/board/g2000/g2000.c
+++ b/board/g2000/g2000.c
@@ -90,7 +90,7 @@
  */
 int checkboard (void)
 {
-	unsigned char str[64];
+	char str[64];
 	int i = getenv_r ("serial#", str, sizeof(str));
 
 	puts ("Board: ");