Arduino IDE 1.5.3 compile error for ATmega8

The Arduino NG with ATmega8 causes an error when compiling.
Even with the BareMinimum sketch.

...arduino-1.5.3\hardware\arduino\avr\cores\arduino\HardwareSerial.cpp: In function 'void __vector_11()':
...arduino-1.5.3\hardware\arduino\avr\cores\arduino\HardwareSerial.cpp:94: error: 'rx_buffer' was not declared in this scope
