1 files changed, 4 insertions, 3 deletions
diff --git a/board/amcc/walnut/walnut.c b/board/amcc/walnut/walnut.c
index 4f299324cd..d3287cea19 100644
--- a/board/amcc/walnut/walnut.c
+++ b/board/amcc/walnut/walnut.c
@@ -67,7 +67,8 @@ int board_early_init_f(void)
  */
 int checkboard(void)
 {
-	char *s = getenv("serial#");
+	char buf[64];
+	int i = getenv_f("serial#", buf, sizeof(buf));
 	uint pvr = get_pvr();
 
 	if (pvr == PVR_405GPR_RB) {
@@ -76,9 +77,9 @@ int checkboard(void)
 		puts("Board: Walnut - AMCC PPC405GP Evaluation Board");
 	}
 
-	if (s != NULL) {
+	if (i > 0) {
 		puts(", serial# ");
-		puts(s);
+		puts(buf);
 	}
 	putc('\n');