diff --git a/lib/shop.lib.php b/lib/shop.lib.php
index 3ad6d193e..c6592d15d 100644
--- a/lib/shop.lib.php
+++ b/lib/shop.lib.php
@@ -343,7 +343,7 @@ function get_cart_count($cart_id)
 
     $sql = " select count(ct_id) as cnt from {$g5['g5_shop_cart_table']} where od_id = '$cart_id' ";
     if($default['de_cart_keep_term']) {
-        $ctime = date('Y-m-d H:i:s', G5_SERVER_TIME - ($default['de_cart_keep_term'] * 86400));
+        $ctime = date('Y-m-d H:i:s', G5_SERVER_TIME - (($default['de_cart_keep_term'] - 1) * 86400));
         $sql .= " and ct_time > '$ctime' ";
     }
     $row = sql_fetch($sql);
diff --git a/mobile/shop/cart.php b/mobile/shop/cart.php
index df16af0af..72ac45d90 100644
--- a/mobile/shop/cart.php
+++ b/mobile/shop/cart.php
@@ -41,7 +41,7 @@ include_once(G5_MSHOP_PATH.'/_head.php');
                    from {$g5['g5_shop_cart_table']} a left join {$g5['g5_shop_item_table']} b on ( a.it_id = b.it_id )
                   where a.od_id = '$s_cart_id' ";
         if($default['de_cart_keep_term']) {
-            $ctime = date('Y-m-d H:i:s', G5_SERVER_TIME - ($default['de_cart_keep_term'] * 86400));
+            $ctime = date('Y-m-d H:i:s', G5_SERVER_TIME - (($default['de_cart_keep_term'] - 1) * 86400));
             $sql .= " and a.ct_time > '$ctime' ";
         }
         $sql .= " group by a.it_id ";
diff --git a/mobile/shop/orderform.php b/mobile/shop/orderform.php
index 7f7df4a61..29d43ccd1 100644
--- a/mobile/shop/orderform.php
+++ b/mobile/shop/orderform.php
@@ -77,7 +77,7 @@ ob_start();
                   where a.od_id = '$s_cart_id'
                     and a.ct_select = '1' ";
         if($default['de_cart_keep_term']) {
-            $ctime = date('Y-m-d H:i:s', G5_SERVER_TIME - ($default['de_cart_keep_term'] * 86400));
+            $ctime = date('Y-m-d H:i:s', G5_SERVER_TIME - (($default['de_cart_keep_term'] - 1) * 86400));
             $sql .= " and a.ct_time > '$ctime' ";
         }
         $sql .= " group by a.it_id ";
diff --git a/shop/cart.php b/shop/cart.php
index 26cb091f3..9f81eda9f 100644
--- a/shop/cart.php
+++ b/shop/cart.php
@@ -62,7 +62,7 @@ include_once('./_head.php');
                    from {$g5['g5_shop_cart_table']} a left join {$g5['g5_shop_item_table']} b on ( a.it_id = b.it_id )
                   where a.od_id = '$s_cart_id' ";
         if($default['de_cart_keep_term']) {
-            $ctime = date('Y-m-d H:i:s', G5_SERVER_TIME - ($default['de_cart_keep_term'] * 86400));
+            $ctime = date('Y-m-d H:i:s', G5_SERVER_TIME - (($default['de_cart_keep_term'] - 1) * 86400));
             $sql .= " and a.ct_time > '$ctime' ";
         }
         $sql .= " group by a.it_id ";
diff --git a/shop/orderform.php b/shop/orderform.php
index cfcd2673b..2fa9c45d8 100644
--- a/shop/orderform.php
+++ b/shop/orderform.php
@@ -205,7 +205,7 @@ function get_intall_file()
                   where a.od_id = '$s_cart_id'
                     and a.ct_select = '1' ";
         if($default['de_cart_keep_term']) {
-            $ctime = date('Y-m-d H:i:s', G5_SERVER_TIME - ($default['de_cart_keep_term'] * 86400));
+            $ctime = date('Y-m-d H:i:s', G5_SERVER_TIME - (($default['de_cart_keep_term'] - 1) * 86400));
             $sql .= " and a.ct_time > '$ctime' ";
         }
         $sql .= " group by a.it_id ";