compilation error

[Shubhamshende7]

Arduino\libraries\Filters-master\FilterTwoPole.cpp: In member function 'void FilterTwoPole::test()':

C:\Users\Shubh\Documents\Arduino\libraries\Filters-master\FilterTwoPole.cpp:198:33: error: 'analogWrite' was not declared in this scope

 analogWrite(10,osc.output() ); // hardcoded the dial pin

                             ^

exit status 1