Conversion failed when converting the varchar value to data type int.

when i execute my store procedure:

PROCEDURE [dbo].[GetEmailAdd_Sp]
    @emplid int
    AS
BEGIN
    Declare @emplEmail varchar(50)

    -- SET NOCOUNT ON added to prevent extra result sets from
    -- interfering with SELECT statements.
    SET NOCOUNT ON;

    Set @emplEmail = (Select emailAdd from HrEmployee where EmplID = @emplid)
    return @emplEmail

END

Conversion failed when converting the varchar value '[SomeEmailID]' to data type int.
Exec

Exec GetEmailAdd_Sp 5