# Error in Libpri installation **URL:** \ **Category:** Asterisk Support\ **Created:** [October 9, 2018, 3:10pm UTC](https://community.asterisk.org/t/error-in-libpri-installation/76552 "2018-10-09T15:10:01Z")\ **Posts on this page:** 2\ **Page:** 1
**Author:** ![futureinfotech](https://avatars.discourse-cdn.com/v4/letter/f/ce73a5/32.png) [@futureinfotech](https://community.asterisk.org/u/futureinfotech)\ **Post date:** [October 9, 2018, 3:10pm UTC](https://community.asterisk.org/t/error-in-libpri-installation/76552/1 "2018-10-09T15:10:01Z")
would anyone please help I am trying to install " libpri " on CENTOS and I get this error message [root@go libpri-1.6.0]# make gcc -g -Wall -Werror -Wstrict-prototypes -Wmissing-prototypes -fPIC -O2 -MD -MT pridump.o -MF .pridump.o.d -MP -c -o pridump.o pridump.c pridump.c:45:24: error: dahdi/user.h: No such file or directory pridump.c: In function ‘pri\_open’: pridump.c:53: error: storage size of ‘p’ isn’t known pridump.c:60: error: ‘DAHDI\_GET\_PARAMS’ undeclared (first use in this function) pridump.c:60: error: (Each undeclared identifier is reported only once pridump.c:60: error: for each function it appears in.) pridump.c:64: error: ‘DAHDI\_SIG\_HDLCRAW’ undeclared (first use in this function) pridump.c:64: error: ‘DAHDI\_SIG\_HDLCFCS’ undeclared (first use in this function) cc1: warnings being treated as errors pridump.c:53: warning: unused variable ‘p’ pridump.c: In function ‘pri\_bridge’: pridump.c:97: error: ‘DAHDI\_GETEVENT’ undeclared (first use in this function) make: \*\*\* [pridump.o] Error 1 ---
**Author:** ![rmudgett](https://sea1.discourse-cdn.com/asterisk/user_avatar/community.asterisk.org/rmudgett/32/1843_2.png) [@rmudgett](https://community.asterisk.org/u/rmudgett)\ **Post date:** [October 9, 2018, 6:40pm UTC](https://community.asterisk.org/t/error-in-libpri-installation/76552/2 "2018-10-09T18:40:51Z")
Install DAHDI first before compiling libpri.