diff --git a/meshlab/src/meshlabplugins/decorate_base/colorhistogram.h b/meshlab/src/meshlabplugins/decorate_base/colorhistogram.h
index 2351b2a..90c6d76 100644
--- a/meshlab/src/meshlabplugins/decorate_base/colorhistogram.h
+++ b/meshlab/src/meshlabplugins/decorate_base/colorhistogram.h
@@ -40,7 +40,7 @@ public:
 
   //! Reset histogram data.
   void Clear() {
-    this->::Clear();
+    Histogram<ScalarType>::Clear();
     CV.clear();
   }
   /*
diff --git a/vcglib/wrap/gl/trimesh.h b/vcglib/wrap/gl/trimesh.h
index 5d40404..ab9d0aa 100644
--- a/vcglib/wrap/gl/trimesh.h
+++ b/vcglib/wrap/gl/trimesh.h
@@ -1003,7 +1003,7 @@ void Crease(MESH_TYPE &m, typename MESH_TYPE::scalar_type angleRad)
 			}
 		}
 
-	m.vert.math::Swap(newvert);
+	m.vert.math.Swap(newvert);
 	m.vn=m.vert.size();
 }
 
diff --git a/vcglib/wrap/ply/plystuff.h b/vcglib/wrap/ply/plystuff.h
index 3e41e63..4af9508 100644
--- a/vcglib/wrap/ply/plystuff.h
+++ b/vcglib/wrap/ply/plystuff.h
@@ -75,6 +75,7 @@ using namespace vcg;
 #define pb_close  _close
 #define DIR_SEP "\\"
 #else
+#include <unistd.h>
 #define pb_mkdir(n)  mkdir(n,0755)
 #define pb_access access
 #define pb_stat   stat