diff --git a/common/mathlib.cc b/common/mathlib.cc
index afcac9b6..92bb250b 100644
--- a/common/mathlib.cc
+++ b/common/mathlib.cc
@@ -26,8 +26,6 @@
 #include <map>
 
 #include <glm/glm.hpp>
-#include <glm/ext.hpp>
-#include <glm/gtx/closest_point.hpp>
 
 using namespace polylib;
 
diff --git a/common/qvec.cc b/common/qvec.cc
index a5ce66e7..a9317af6 100644
--- a/common/qvec.cc
+++ b/common/qvec.cc
@@ -19,6 +19,8 @@
 
 #include <common/qvec.hh>
 
+#include <sstream>
+
 /*
  * SGI FREE SOFTWARE LICENSE B (Version 2.0, Sept. 18, 2008)
  * Copyright (C) 1991-2000 Silicon Graphics, Inc. All Rights Reserved.
@@ -136,3 +138,10 @@ qmat2x2f qv::invert(const qmat2x2f &m, bool *ok)
     
     return result * (1.0f/det);
 }
+
+std::string qv::to_string(const qvec<3,float> &v1)
+{
+    std::stringstream ss;
+    ss << v1[0] << " " << v1[1] << " " << v1[2];
+    return ss.str();
+}
diff --git a/include/common/qvec.hh b/include/common/qvec.hh
index 30e75613..5003a112 100644
--- a/include/common/qvec.hh
+++ b/include/common/qvec.hh
@@ -23,6 +23,7 @@
 #include <initializer_list>
 #include <cassert>
 #include <cmath>
+#include <string>
 
 #ifndef qmax // FIXME: Remove this ifdef
 #define qmax(a,b) (((a)>(b)) ? (a) : (b))
@@ -205,6 +206,8 @@ namespace qv {
     T distance(const qvec<N,T> &v1, const qvec<N,T> &v2) {
         return length(v2 - v1);
     }
+    
+    std::string to_string(const qvec<3,float> &v1);
 };