diff --git a/src/OpenMesh/Apps/Decimating/decimater.cc b/src/OpenMesh/Apps/Decimating/decimater.cc
index b3127a62..2e31e18f 100644
--- a/src/OpenMesh/Apps/Decimating/decimater.cc
+++ b/src/OpenMesh/Apps/Decimating/decimater.cc
@@ -369,7 +369,7 @@ decimate(const std::string &_ifname,
      float nv_before = float(mesh.n_vertices());
 
      timer.start();
-     int rc = 0;
+     size_t rc = 0;
      if (_opt.n_collapses < 0.0)
        rc = decimater.decimate_to( size_t(-_opt.n_collapses) );
      else if (_opt.n_collapses >= 1.0 || _opt.n_collapses == 0.0)
diff --git a/src/OpenMesh/Apps/Subdivider/adaptive_subdivider.cc b/src/OpenMesh/Apps/Subdivider/adaptive_subdivider.cc
index 21d1cce5..ee23b604 100644
--- a/src/OpenMesh/Apps/Subdivider/adaptive_subdivider.cc
+++ b/src/OpenMesh/Apps/Subdivider/adaptive_subdivider.cc
@@ -301,8 +301,8 @@ int main(int argc, char **argv)
     i = 0;
 
     // calculate target states for faces and vertices
-    int target1 = (n - 1) * n_rules + subdivider.subdiv_rule().number() + 1;
-    int target2 = n * n_rules;
+    size_t target1 = (n - 1) * n_rules + subdivider.subdiv_rule().number() + 1;
+    size_t target2 = n * n_rules;
 
     for (f_it = mesh.faces_begin(); f_it != mesh.faces_end(); ++f_it) {
       
diff --git a/src/OpenMesh/Apps/VDProgMesh/mkbalancedpm/mkbalancedpm.cc b/src/OpenMesh/Apps/VDProgMesh/mkbalancedpm/mkbalancedpm.cc
index d7c6aaf7..a6c16522 100644
--- a/src/OpenMesh/Apps/VDProgMesh/mkbalancedpm/mkbalancedpm.cc
+++ b/src/OpenMesh/Apps/VDProgMesh/mkbalancedpm/mkbalancedpm.cc
@@ -308,7 +308,7 @@ int main(int argc, char **argv)
     std::cout << "  done [" << t.as_string() << "]\n";
     t.reset();
 
-    int    rc;
+    size_t rc;
     size_t nv = mesh.n_vertices();
 
     std::cout << "Begin decimation (#V " << nv << ")\n";
diff --git a/src/OpenMesh/Tools/Utils/StripifierT.hh b/src/OpenMesh/Tools/Utils/StripifierT.hh
index 225dbfbb..579eb9cb 100644
--- a/src/OpenMesh/Tools/Utils/StripifierT.hh
+++ b/src/OpenMesh/Tools/Utils/StripifierT.hh
@@ -98,7 +98,7 @@ public:
   void clear() { Strips().swap(strips_); }
 
   /// returns number of strips
-  unsigned int n_strips() const { return strips_.size(); }
+  size_t n_strips() const { return strips_.size(); }
 
   /// are strips computed?
   bool is_valid() const { return !strips_.empty(); }