SQL query dont show Subtrated values which are 0

Hello there,

I have this select query which subtracts two columns and then I have a SUm on them. It is working as I am expecting but can I refine my result so that the value 0 is not included in the result

SELECT
    dbo.Branch.code,
     dbo.Branch.name        AS Branch,
    SUM(dbo.WarehouseProductQuantity.actualQuantity - dbo.WarehouseProductQuantity.reservedQuantity
    ) AS AvailQty

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cheers
ZOlf