diff -ur a/src/generator_exception.cpp b/src/generator_exception.cpp
--- a/src/generator_exception.cpp	2012-01-26 19:24:54.000000000 +0200
+++ b/src/generator_exception.cpp	2016-12-21 13:13:42.149159300 +0200
@@ -12,7 +12,7 @@
 	return _error_code;
 }
 
-const char *generator_exception::what() const
+const char *generator_exception::what() const noexcept
 {
 	const char *msg = "unknown error_code";
 
diff -ur a/src/generator_exception.h b/src/generator_exception.h
--- a/src/generator_exception.h	2012-01-26 19:23:36.000000000 +0200
+++ b/src/generator_exception.h	2016-12-21 13:13:20.941038700 +0200
@@ -14,7 +14,7 @@
 	generator_exception(error_code_type ecode);
 
 	error_code_type error_code() const;
-	virtual const char *what() const;
+	virtual const char *what() const noexcept;
 
 private:
 	error_code_type _error_code;