--- a/src/MnUserTransformation.cpp	2018-06-22 11:35:34.476798087 +0200
+++ b/src/MnUserTransformation.cpp	2018-06-22 11:08:01.729725829 +0200
@@ -2,6 +2,7 @@
 #include "Minuit/MnUserCovariance.h"
 
 #include <algorithm>
+#include <cstdio>
 
 class MnParStr {