diff --git a/board/digsy_mtc/digsy_mtc.c b/board/digsy_mtc/digsy_mtc.c
index 9f13a3d..588face 100644
--- a/board/digsy_mtc/digsy_mtc.c
+++ b/board/digsy_mtc/digsy_mtc.c
@@ -191,15 +191,16 @@
 
 int checkboard(void)
 {
-	char *s = getenv("serial#");
+	char buf[64];
+	int i = getenv_f("serial#", buf, sizeof(buf));
 
 	puts ("Board: InterControl digsyMTC");
 #if defined(CONFIG_DIGSY_REV5)
 	puts (" rev5");
 #endif
-	if (s != NULL) {
+	if (i > 0) {
 		puts(", ");
-		puts(s);
+		puts(buf);
 	}
 	putc('\n');