diff --git a/eo/src/pyeo/Makefile b/eo/src/pyeo/Makefile
index 3bf2977c2..5b1f208c3 100644
--- a/eo/src/pyeo/Makefile
+++ b/eo/src/pyeo/Makefile
@@ -5,13 +5,13 @@
 # Boost.Python v2
 #
 
-CXX = g++ #-3.2
-CXXFLAGS = -DHAVE_SSTREAM#-g #-DNDEBUG
+CXX = g++ 
+CXXFLAGS = -DHAVE_SSTREAM
 CPPFLAGS = -Wall -O2 #-g #-O2
 LDFLAGS = 
 COMPILE = $(CXX) $(CXXFLAGS) $(CPPFLAGS) -c
 LINK = $(CXX) $(CXXFLAGS) $(CPPFLAGS) $(LDFLAGS) 
-INC=-I/usr/include/python2.2 -I/home/mkeijzer/src/boost -I.. -ftemplate-depth-50 #-I/usr/include/stlport
+INC=-I/usr/include/python2.4 -I.. -I../.. -ftemplate-depth-50 
 
 OBJECTS=eoFunctorStore.o PyEO.o abstract1.o algos.o \
 	random_numbers.o geneticOps.o selectOne.o continuators.o\
@@ -25,7 +25,7 @@ clean:
 	rm PyEO/*.so *.o test/*.pyc
 
 PyEO/PyEO.so: $(OBJECTS)
-	$(LINK) -o PyEO/PyEO.so $(OBJECTS) -lboost_python -lpython2.2 -shared #-lstlport
+	$(LINK) -o PyEO/PyEO.so $(OBJECTS) -lboost_python -lpython2.4 -shared #-lstlport
 
 eoFunctorStore.o: ../eoFunctorStore.h ../eoFunctorStore.cpp
 	$(COMPILE) -o eoFunctorStore.o ../eoFunctorStore.cpp $(INC)
diff --git a/eo/src/pyeo/random_numbers.cpp b/eo/src/pyeo/random_numbers.cpp
index bd0b29198..100ac38e0 100644
--- a/eo/src/pyeo/random_numbers.cpp
+++ b/eo/src/pyeo/random_numbers.cpp
@@ -88,7 +88,7 @@ int spin(eoRng& _rng, numeric::array values, double total)
 
 void random_numbers()
 {
-    class_<eoRng, boost::noncopyable>("eoRng", init<uint32>())
+    class_<eoRng, boost::noncopyable>("eoRng", init<uint32_t>())
 	.def("flip", &eoRng::flip)
 	.def("random", &eoRng::random)
 	.def("rand", &eoRng::rand)
diff --git a/eo/src/pyeo/valueParam.cpp b/eo/src/pyeo/valueParam.cpp
index c648df5f2..606251802 100644
--- a/eo/src/pyeo/valueParam.cpp
+++ b/eo/src/pyeo/valueParam.cpp
@@ -45,7 +45,7 @@ public:
 	return call_method<std::string>(self, "getValueAsString");
     }
 
-    void setValue(std::string s)
+    void setValue(const std::string& s)
     {
 	call_method<void>(self, "setValueAsString", s);
     }
diff --git a/eo/src/pyeo/valueParam.h b/eo/src/pyeo/valueParam.h
index 4ca7f61bc..783f2fc13 100644
--- a/eo/src/pyeo/valueParam.h
+++ b/eo/src/pyeo/valueParam.h
@@ -30,7 +30,7 @@ class ValueParam : public eoParam // ValueParam containing python object
 	return std::string(boost::python::extract<const char*>(s));
     }
 
-    void setValue(std::string v)
+    void setValue(const std::string& v)
     {
 	std::cerr << "not implemented yet" << std::endl;
     }