--- nghttp2-1.3.0/src/Makefile.am.orig	2015-09-06 17:57:30.052519494 +0200
+++ nghttp2-1.3.0/src/Makefile.am	2015-09-06 18:20:57.609127150 +0200
@@ -216,6 +216,6 @@
 	${BOOST_LDFLAGS} \
 	${BOOST_ASIO_LIB} \
 	${BOOST_THREAD_LIB} \
-	${BOOST_SYSTEM_LIB}
+	${BOOST_SYSTEM_LIB} -lpthread
 
 endif # ENABLE_ASIO_LIB