diff -up Net-Pcap-0.18/Makefile.PL.orig Net-Pcap-0.18/Makefile.PL
--- Net-Pcap-0.18/Makefile.PL.orig	2019-06-13 00:50:15.000000000 -0600
+++ Net-Pcap-0.18/Makefile.PL	2019-06-13 01:00:15.000000000 -0600
@@ -107,6 +107,7 @@ REASON
 # corresponding tests. 
 my @funcs = have_functions(find_functions());
 $options{DEFINE} .= cpp_defines(@funcs);
+$options{DEFINE} .= " -DPCAP_API=\"\" -DHAVE_PCAP_OPEN -DHAVE_PCAP_SETSAMPLING";
 open(FUNCS, '>funcs.txt') or warn "warning: can't write 'funcs.txt': $!\n";
 print FUNCS join("\n", @funcs), "\n";
 close(FUNCS);