--- cfmu/Makefile.am.link	2013-03-04 19:20:12.935680105 +0100
+++ cfmu/Makefile.am	2013-03-04 20:04:14.944986629 +0100
@@ -7,12 +7,12 @@
 cfmuvalidate_SOURCES = cfmuvalidate.cc cfmuvalidate.hh
 cfmuvalidate_LDADD = ../src/libvfrnav.a @LIBS@ @GTKMM_LIBS@ @GLIBMM_LIBS@ @GIOMM_LIBS@ \
 	@PILOTLINK_LIBS@ @BOOST_LIBS@ @SQLITE3X_LIBS@ @WEBKITGTK_LIBS@
-cfmuvalidate_LDFLAGS = @BOOST_LDFLAGS@
+cfmuvalidate_LDFLAGS = @BOOST_LDFLAGS@ -pthread
 
 cfmuvalidateserver_SOURCES = cfmuvalidateserver.cc cfmuvalidateserver.hh
 cfmuvalidateserver_LDADD = ../src/libvfrnav.a @LIBS@ @GTKMM_LIBS@ @GLIBMM_LIBS@ @GIOMM_LIBS@ \
 	@PILOTLINK_LIBS@ @BOOST_LIBS@ @SQLITE3X_LIBS@ @WEBKITGTK_LIBS@
-cfmuvalidateserver_LDFLAGS = @BOOST_LDFLAGS@
+cfmuvalidateserver_LDFLAGS = @BOOST_LDFLAGS@ -pthread
 
 libcfmuautoroute_a_SOURCES = cfmuautorouteproxy.cc cfmuautorouteproxy.hh