diff --git a/process/Product_lib/process.js b/process/Product_lib/process.js
index f6b58db1ec5ec0ff20a7dd12ffdecf6bcbb62bbc..d095b4ff116164f602bf11bbafe05516db243db2 100644
--- a/process/Product_lib/process.js
+++ b/process/Product_lib/process.js
@@ -79,7 +79,7 @@ ProductUtils.getCurrentProductPrice = function(pid, buySell, onlyStandard, pCurr
 ProductUtils.getStockCount = function(pid) {
     if (pid != undefined && pid != "")
     {
-        var sum = newSelect("sum(QUANTITY * case IN_OUT when 0 then -1 else 1)")
+        var sum = newSelect("sum(QUANTITY * case IN_OUT when 0 then -1 else 1 end)")
                         .from("STOCK")
                         .whereIfSet("STOCK.PRODUCT_ID", pid)
                         .cell(true, "0");