diff --git a/env/mtd.c b/env/mtd.c
index ad263ed4b29..b26ee80985a 100644
--- a/env/mtd.c
+++ b/env/mtd.c
@@ -201,7 +201,7 @@ static int env_mtd_erase(void)
 {
 	struct mtd_info *mtd_env;
 	u32 sect_size, sect_num;
-	char *saved_buf, *tmp;
+	char *saved_buf = NULL, *tmp;
 	struct erase_info ei;
 	size_t ret_len;
 	int remaining;