compiling bridge-utils-0.9.6

Linux SuSe 9.0, kernel 2.24.21-166...

I got the error

libbridge_misc.c: In function `__tv_to_jiffies':
libbridge_misc.c:33: error: `HZ' undeclared (first use in this function) libbridge_misc.c:33: error: (Each undeclared identifier is reported only once libbridge_misc.c:33: error: for each function it appears in.) libbridge_misc.c: In function `__jiffies_to_tv':
libbridge_misc.c:40: error: `HZ' undeclared (first use in this function) make[1]: *** [libbridge_misc.o] Error 1

I could not find any hints.

Regards, Wilfried