diff --git a/Common/Exception.cpp b/Common/Exception.cpp
index 5295312..ea79889 100644
--- a/Common/Exception.cpp
+++ b/Common/Exception.cpp
@@ -33,7 +33,7 @@ Exception::~Exception() throw()
 {
 }
 
-const char *Exception::what()
+const char *Exception::what() const throw()
 {
     return _string.c_str();
 }
diff --git a/Common/Exception.h b/Common/Exception.h
index 3377cac..d55eed3 100644
--- a/Common/Exception.h
+++ b/Common/Exception.h
@@ -14,7 +14,7 @@ public:
     
     virtual ~Exception() throw ();
     
-    virtual const char *what();
+    virtual const char *what() const throw();
     virtual const char *errorString();
     
     int error() const { return _error; }