diff --git a/common/env_mmc.c b/common/env_mmc.c
index a2ff90b..ce21671 100644
--- a/common/env_mmc.c
+++ b/common/env_mmc.c
@@ -130,7 +130,7 @@
 	}
 
 	res = (char *)&env_new->data;
-	len = hexport_r(&env_htab, '\0', &res, ENV_SIZE, 0, NULL);
+	len = hexport_r(&env_htab, '\0', 0, &res, ENV_SIZE, 0, NULL);
 	if (len < 0) {
 		error("Cannot export environment: errno = %d\n", errno);
 		ret = 1;