diff --git a/Kinetic_data_structures/demo/Kinetic_data_structures/Delaunay_triangulation_3.cpp b/Kinetic_data_structures/demo/Kinetic_data_structures/Delaunay_triangulation_3.cpp
index cf194741ddd..8e76a00afe9 100644
--- a/Kinetic_data_structures/demo/Kinetic_data_structures/Delaunay_triangulation_3.cpp
+++ b/Kinetic_data_structures/demo/Kinetic_data_structures/Delaunay_triangulation_3.cpp
@@ -18,7 +18,7 @@
 
 int main(int argc, char *argv[])
 {
-#ifdef CGAL_USE_SOQT
+#ifdef CGAL_USE_COIN
     int n=10;
     int d=2;
     bool print_help=false;
diff --git a/Kinetic_data_structures/include/CGAL/Kinetic/Sort.h b/Kinetic_data_structures/include/CGAL/Kinetic/Sort.h
index 40f9a1e817e..ea0a627f5d4 100644
--- a/Kinetic_data_structures/include/CGAL/Kinetic/Sort.h
+++ b/Kinetic_data_structures/include/CGAL/Kinetic/Sort.h
@@ -378,7 +378,7 @@ public:
     CGAL_precondition(it->object() == k);
     
     v_.pre_remove_vertex(it);
-    if (next(it) != end()) {
+    if (next(it) != Iterator(end())) {
       simulator_->delete_event(it->event());
       it->set_event(Event_key());
     }
diff --git a/Kinetic_data_structures/include/CGAL/Kinetic/internal/Delaunay_triangulation_base_3.h b/Kinetic_data_structures/include/CGAL/Kinetic/internal/Delaunay_triangulation_base_3.h
index 13a8d5c4491..497f9aa90c2 100644
--- a/Kinetic_data_structures/include/CGAL/Kinetic/internal/Delaunay_triangulation_base_3.h
+++ b/Kinetic_data_structures/include/CGAL/Kinetic/internal/Delaunay_triangulation_base_3.h
@@ -1032,8 +1032,9 @@ protected:
     std::vector<Cell_handle> ics;
     triangulation().incident_cells(v, std::back_inserter(ics));
     for (unsigned int i=0; i< ics.size(); ++i) {
-      int j;
-      bool ret=ics[i]->has_vertex(v, j);
+      int j=-1;// disable warning
+      bool ret=ics[i]->has_vertex(v, j); // initializes j
+      CGAL_assertion(j != -1);
       CGAL_assertion(ret);
       for (int k=0; k<4 ; ++k) {
 	if (k==j) continue;
diff --git a/Kinetic_data_structures/test/Kinetic_data_structures/numbers.cpp b/Kinetic_data_structures/test/Kinetic_data_structures/numbers.cpp
index 4e4efde9f02..7bb330774bc 100644
--- a/Kinetic_data_structures/test/Kinetic_data_structures/numbers.cpp
+++ b/Kinetic_data_structures/test/Kinetic_data_structures/numbers.cpp
@@ -8,7 +8,7 @@
 template <class NT>
 void check_nt(NT v) {
   NT zero(0);
-  assert(v <= 0 || v > 0);                  // break symmetry due to compiler warning
+  assert(v <= zero || v > zero);                  // break symmetry due to compiler warning
   if (std::numeric_limits<NT>::has_infinity) {
     NT inf= std::numeric_limits<NT>::infinity();
     //NT inf2=inf;