Convert your standard American three prong plug to the IEC C6 to plug into a C5 receptacle.
USA NEMA 5-15R to IEC C6 Plug Adapter: IEC C6 cloverleaf plug to USA NEMA 5-15R receptacle plug adapter. Rated up to 2.5A 250V.
CAUTION: This plug adapter does NOT transform voltage or current. Verify that your device can safely operate at the voltage supplied by the source before connecting. Assure voltage and current are less than or equal to the rating listed on the adapter. Voltage mismatch can cause damage to your device or even bodily harm.