diff --git a/src/driver.cpp b/src/driver.cpp
index 8f5dcd3..71cc3f9 100644
--- a/src/driver.cpp
+++ b/src/driver.cpp
@@ -1,7 +1,6 @@
 #include "Parsodus/driver.h"
 #include "Parsodus/inputparser.h"
 #include "Parsodus/config.h"
-
 #include <fstream>
 
 namespace {
@@ -26,6 +25,7 @@ namespace pds {
         }
 
     Driver::~Driver(){}
+
     int Driver::run() { 
         if (!m_lexername.length()) throw DriverException("no valid lexer name possible"); 
         if (!m_parsername.length()) throw DriverException("no valid parser name possible"); 
@@ -35,9 +35,15 @@ namespace pds {
 		back->generateParser([this](std::string filename) -> std::unique_ptr<std::ostream> {
 				return std::unique_ptr<std::ostream>(new std::ofstream(m_outputdir + "/" + filename));
 				},
-				m_lexername, config);  
+				m_parsername, config);  
 
         return 0; 
     }
+
+    DriverException::DriverException(std::string what): m_what(what) {} 
+    const char* DriverException::what() const throw() {
+        return m_what.c_str();
+    }
+
 }