diff --git a/src/main/resources/egovframework/mapper/nlib/bbs/AttachFileDAO_SQL.xml b/src/main/resources/egovframework/mapper/nlib/bbs/AttachFileDAO_SQL.xml
index 9610799e..29823cc7 100644
--- a/src/main/resources/egovframework/mapper/nlib/bbs/AttachFileDAO_SQL.xml
+++ b/src/main/resources/egovframework/mapper/nlib/bbs/AttachFileDAO_SQL.xml
@@ -16,8 +16,8 @@
         FROM BD_FILE A
         JOIN BD_FILEDETAIL B ON (A.ATTACH_FILE_ID = B.ATTACH_FILE_ID)
         WHERE A.ATTACH_FILE_ID = #{attachFileId}
-        AND A.USE_AT = 'Y'
-        AND B.USE_AT = 'Y'
+        AND IFNULL(A.USE_AT,'Y') = 'Y'
+        AND IFNULL(B.USE_AT,'Y') = 'Y'
         ORDER BY B.FILE_SN
     </select>
     
@@ -35,8 +35,8 @@
         JOIN BD_FILEDETAIL B ON (A.ATTACH_FILE_ID = B.ATTACH_FILE_ID)
         WHERE A.ATTACH_FILE_ID = #{attachFileId}
         AND B.FILE_SN = #{fileSn}
-        AND A.USE_AT = 'Y'
-        AND B.USE_AT = 'Y'
+        AND IFNULL(A.USE_AT,'Y') = 'Y'
+        AND IFNULL(B.USE_AT,'Y') = 'Y'
     </select>
  	
     <select id="checkAttachFileDownload" parameterType="AttachFileVO" resultType="String">