diff --git a/drivers/ufs/core/ufshcd.c b/drivers/ufs/core/ufshcd.c
index 5c1be0a2638b..68d7da02944f 100644
--- a/drivers/ufs/core/ufshcd.c
+++ b/drivers/ufs/core/ufshcd.c
@@ -3728,7 +3728,7 @@ int ufshcd_read_string_desc(struct ufs_hba *hba, u8 desc_index,
 		 */
 		ret = utf16s_to_utf8s(uc_str->uc,
 				      uc_str->len - QUERY_DESC_HDR_SIZE,
-				      UTF16_BIG_ENDIAN, str, ascii_len);
+				      UTF16_BIG_ENDIAN, str, ascii_len - 1);
 
 		/* replace non-printable or non-ASCII characters with spaces */
 		for (i = 0; i < ret; i++)