diff --git a/lemon/clp.cc b/lemon/clp.cc
--- a/lemon/clp.cc
+++ b/lemon/clp.cc
@@ -24,7 +24,7 @@
   ClpLp::ClpLp() {
     _prob = new ClpSimplex();
     _init_temporals();
-    messageLevel(MESSAGE_NO_OUTPUT);
+    messageLevel(MESSAGE_NOTHING);
   }
 
   ClpLp::ClpLp(const ClpLp& other) {
@@ -32,7 +32,7 @@
     rows = other.rows;
     cols = other.cols;
     _init_temporals();
-    messageLevel(MESSAGE_NO_OUTPUT);
+    messageLevel(MESSAGE_NOTHING);
   }
 
   ClpLp::~ClpLp() {
@@ -430,8 +430,24 @@
     _clear_temporals();
   }
 
-  void ClpLp::messageLevel(MessageLevel m) {
-    _prob->setLogLevel(static_cast<int>(m));
+  void ClpLp::_messageLevel(MessageLevel level) {
+    switch (level) {
+    case MESSAGE_NOTHING:
+      _prob->setLogLevel(0);
+      break;
+    case MESSAGE_ERROR:
+      _prob->setLogLevel(1);
+      break;
+    case MESSAGE_WARNING:
+      _prob->setLogLevel(2);
+      break;
+    case MESSAGE_NORMAL:
+      _prob->setLogLevel(3);
+      break;
+    case MESSAGE_VERBOSE:
+      _prob->setLogLevel(4);
+      break;
+    }
   }
 
 } //END OF NAMESPACE LEMON