build error on 3.1.0

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Hi all, I'm trying to build 3.1.0. Cmake completes successfully, but make fails with the following:

[  6%] Building C object caputils/CMakeFiles/caputils.dir/capture-pcap-util-unix.c.o
[  6%] Building C object caputils/CMakeFiles/caputils.dir/capture-pcap-util.c.o
[  6%] Building C object caputils/CMakeFiles/caputils.dir/iface_monitor.c.o
/home/ron/wireshark-3.1.0/caputils/iface_monitor.c: In function ‘iface_mon_handler2’:
/home/ron/wireshark-3.1.0/caputils/iface_monitor.c:85:5: error: implicit declaration of function ‘nl_object_get_msgtype’ [-Werror=implicit-function-declaration]
     int msg_type = nl_object_get_msgtype(obj);
     ^
cc1: all warnings being treated as errors
make[2]: *** [caputils/CMakeFiles/caputils.dir/iface_monitor.c.o] Error 1
make[1]: *** [caputils/CMakeFiles/caputils.dir/all] Error 2
make: *** [all] Error 2
[ron@dl380g5centos7 build]$

Does anyone have a suggestion as to how to proceed? Thanks.