diff --git a/board/snmc/qs850/qs850.c b/board/snmc/qs850/qs850.c
index cc8eaad..43f7495 100644
--- a/board/snmc/qs850/qs850.c
+++ b/board/snmc/qs850/qs850.c
@@ -100,7 +100,7 @@
 	char buf[64];
 	int i;
 
-	i = getenv_r("serial#", buf, sizeof(buf));
+	i = getenv_f("serial#", buf, sizeof(buf));
 	s = (i>0) ? buf : NULL;
 
 	if (!s || strncmp(s, BOARD_IDENTITY, 5)) {