diff -r f05270f176d9 -r 18c89646185e lemon/arg_parser.h
--- a/lemon/arg_parser.h	Thu Apr 02 10:03:35 2015 +0200
+++ b/lemon/arg_parser.h	Thu Apr 02 12:57:18 2015 +0200
@@ -26,6 +26,7 @@
 #include <iostream>
 #include <sstream>
 #include <algorithm>
+#include <lemon/core.h>
 #include <lemon/assert.h>
 
 ///\ingroup misc