diff -Nru a/Makefile.in b/Makefile.in
--- a/Makefile.in	2018-07-22 19:08:39.000000000 +0200
+++ b/Makefile.in	2018-08-16 07:11:57.945665567 +0200
@@ -55,7 +55,7 @@
 DEFS = -DBUILDING_PCAP -Dpcap_EXPORTS @DEFS@ @V_DEFS@
 ADDLOBJS = @ADDLOBJS@
 ADDLARCHIVEOBJS = @ADDLARCHIVEOBJS@
-LIBS = @LIBS@
+LIBS = @LIBS@ -lpthread
 CROSSFLAGS=
 CFLAGS = @CFLAGS@   ${CROSSFLAGS}
 LDFLAGS = @LDFLAGS@ ${CROSSFLAGS}