Dimmer.h issues with ATmega 128

[TechCreogen]

I am using a ZCD circuit controlling a TRIAC. Now I am using Dimmer library for this purpose. It works fine with ATMega 328 but whenever I try to upload the code in ATMega 128 using Arduino IDE this error pops up:
`Arduino: 1.8.4 (Windows 10), Board: "ATmega128, 2.7v, Disabled (default), 16 MHz external"

C:\Program Files (x86)\Arduino\libraries\Dimmer-master\src\Dimmer.cpp: In member function 'void Dimmer::begin(uint8_t, bool)':

C:\Program Files (x86)\Arduino\libraries\Dimmer-master\src\Dimmer.cpp:15:20: error: 'TCCR2A' was not declared in this scope

#define _TCCRxA(X) TCCR ## X ## A

                ^

C:\Program Files (x86)\Arduino\libraries\Dimmer-master\src\Dimmer.cpp:16:19: note: in expansion of macro '_TCCRxA'

#define TCCRxA(X) _TCCRxA(X)

               ^

C:\Program Files (x86)\Arduino\libraries\Dimmer-master\src\Dimmer.cpp:157:5: note: in expansion of macro 'TCCRxA'

 TCCRxA(DIMMER_TIMER) = TCCRxA_VALUE;         // Timer config byte A

 ^

C:\Program Files (x86)\Arduino\libraries\Dimmer-master\src\Dimmer.cpp:17:20: error: 'TCCR2B' was not declared in this scope

#define _TCCRxB(X) TCCR ## X ## B

                ^

C:\Program Files (x86)\Arduino\libraries\Dimmer-master\src\Dimmer.cpp:18:19: note: in expansion of macro '_TCCRxB'

#define TCCRxB(X) _TCCRxB(X)

               ^

C:\Program Files (x86)\Arduino\libraries\Dimmer-master\src\Dimmer.cpp:158:5: note: in expansion of macro 'TCCRxB'

 TCCRxB(DIMMER_TIMER) = TCCRxB_VALUE;         // Timer config byte B

 ^

C:\Program Files (x86)\Arduino\libraries\Dimmer-master\src\Dimmer.cpp:19:20: error: 'TIMSK2' was not declared in this scope

#define _TIMSKx(X) TIMSK ## X

                ^

C:\Program Files (x86)\Arduino\libraries\Dimmer-master\src\Dimmer.cpp:20:19: note: in expansion of macro '_TIMSKx'

#define TIMSKx(X) _TIMSKx(X)

               ^

C:\Program Files (x86)\Arduino\libraries\Dimmer-master\src\Dimmer.cpp:159:5: note: in expansion of macro 'TIMSKx'

 TIMSKx(DIMMER_TIMER) = 0x02;                 // Timer Compare Match Interrupt Enable

 ^

C:\Program Files (x86)\Arduino\libraries\Dimmer-master\src\Dimmer.cpp:21:19: error: 'OCR2A' was not declared in this scope

#define _OCRxA(X) OCR ## X ## A

               ^

C:\Program Files (x86)\Arduino\libraries\Dimmer-master\src\Dimmer.cpp:22:18: note: in expansion of macro '_OCRxA'

#define OCRxA(X) _OCRxA(X)

              ^

C:\Program Files (x86)\Arduino\libraries\Dimmer-master\src\Dimmer.cpp:160:5: note: in expansion of macro 'OCRxA'

 OCRxA(DIMMER_TIMER) = 100 * 60 / acFreq - 1; // Compare value (frequency adjusted)

 ^

exit status 1
Error compiling for board ATmega128.

This report would have more information with
"Show verbose output during compilation"
option enabled in File -> Preferences.`

Any idea what is the issue ?