A reinforcing system for a guy anchor used in a guyed or additionally guyed tower includes a concrete structure formed around the guy anchor. The concrete structure has a top surface slightly above grade level. The reinforcing system further includes a supplemental anchor shaft. The supplemental anchor shaft is attached to the existing anchor head and extends down into the concrete structure, where it is retained and encased therein. The concrete structure preferably has a base and at least one wall that extends down from the base and has a surface that faces the tower to resist horizontal forces. The reinforcing system is sufficiently strong to keep the guy anchor in place even if the original anchor shaft completely corrodes. The supplemental anchor shaft does not generally come into contact with soil. It therefore resists corrosion and is expected to provide a long service life.