diff --git a/board/gw8260/gw8260.c b/board/gw8260/gw8260.c
index 28f5ca9..77a1e1d 100644
--- a/board/gw8260/gw8260.c
+++ b/board/gw8260/gw8260.c
@@ -214,13 +214,13 @@
 /*********************************************************************/
 int checkboard (void)
 {
-	char *str;
+	char buf[64];
+	int i = getenv_f("serial#", buf, sizeof(buf));
 
 	puts ("Board: Advent Networks gw8260\n");
 
-	str = getenv ("serial#");
-	if (str != NULL) {
-		printf ("SN:    %s\n", str);
+	if (i > 0) {
+		printf("SN:    %s\n", buf);
 	}
 	return 0;
 }