1 files changed, 3 insertions, 0 deletions
diff --git a/src/libvpsc/generate-constraints.cpp b/src/libvpsc/generate-constraints.cpp
index 312ad960b..3b69e7968 100644
--- a/src/libvpsc/generate-constraints.cpp
+++ b/src/libvpsc/generate-constraints.cpp
@@ -20,10 +20,12 @@
 using std::set;
 using std::vector;
 
+namespace vpsc {
 std::ostream& operator <<(std::ostream &os, const Rectangle &r) {
 	os << "{"<<r.minX<<","<<r.maxX<<","<<r.minY<<","<<r.maxY<<"},";
 	return os;
 }
+
 Rectangle::Rectangle(double x, double X, double y, double Y) 
 : minX(x),maxX(X),minY(y),maxY(Y) {
 		assert(x<=X);
@@ -301,3 +303,4 @@ int generateYConstraints(const int n, Rectangle** rs, Variable** vars, Constrain
 	for(i=0;i<m;i++) cs[i]=constraints[i];
 	return m;
 }
+}