Update column value by itself when @Location is empty

CASE WHEN @Location <> '' THEN @Location ELSE Location END

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>I have a SQL Stored procedure where a certain value is passed as character, as follows:
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>@Location char(20) = '',
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>Then the store procedure should update fields of a table; one of the fields is Location. But the field Location should be updated only if the passed variable @Location has value (not empty).
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>Can I do it in one SQL Command (instead of using IF)? That is, how would I change the following expression?
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>update MyTable set Field1 = @Field1, Field2 = @Field2, Location = @Location where Table_pk = 12
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>TIA