--- mtest/src/AsterSmallStrainBehaviour.cxx.orig	2019-04-04 06:48:40 UTC
+++ mtest/src/AsterSmallStrainBehaviour.cxx
@@ -12,6 +12,7 @@
  */
 
 #include<cmath>
+#include<ostream>
 #include<algorithm>
 
 #include"TFEL/Raise.hxx"
