diff --git a/Makefile b/Makefile
index ed6faae..fa093cb 100644
--- a/Makefile
+++ b/Makefile
@@ -2,7 +2,7 @@ include ../../Makefile.conf
 
 TARGET=src/libPityTest.a
 LDFLAGS:=-L../../src/ $(LDFLAGS) -L../framework/
-LDLIBS=-lstdc++ -lpEpAdapter -lpEpEngine
+LDLIBS=-lstdc++ -lpEpAdapter -lpEpEngine -lpthread -ldl
 CXXFLAGS:=-std=c++11 -g -I./src $(CXXFLAGS)
 TEST_EXTRA_OBJS=../framework/utils.o
 
diff --git a/src/PityTree.hh b/src/PityTree.hh
index c1a5bf8..eafa01a 100644
--- a/src/PityTree.hh
+++ b/src/PityTree.hh
@@ -10,6 +10,7 @@
 #include <memory>
 #include <functional>
 #include <type_traits>
+#include <vector>
 
 namespace pEp {
     namespace PityTest11 {
diff --git a/src/PityTree.hxx b/src/PityTree.hxx
index 8cc6c6f..9215175 100644
--- a/src/PityTree.hxx
+++ b/src/PityTree.hxx
@@ -7,6 +7,7 @@
 #include "PityTree.hh"
 #include <memory>
 #include <sstream>
+#include <algorithm>
 
 namespace pEp {
     namespace PityTest11 {