diff --git a/vcg/complex/exception.h b/vcg/complex/exception.h
index c40acf53..e7207f93 100644
--- a/vcg/complex/exception.h
+++ b/vcg/complex/exception.h
@@ -38,6 +38,19 @@ public:
       return buf;
     }
 };
+class MissingCompactnessException : public std::runtime_error
+{
+public:
+  MissingCompactnessException(const std::string &err):std::runtime_error(err)
+  {
+    std::cout << "Lack of Compactness Exception -" << err << "- \n";
+  }
+    virtual const char *what() const throw ()
+    {
+      static char buf[128]="Lack of Compactness";
+      return buf;
+    }
+};
 }
 
 #endif // EXCEPTION_H