--- mtest/src/PipeQuadraticElement.cxx.orig	2019-04-04 06:48:40 UTC
+++ mtest/src/PipeQuadraticElement.cxx
@@ -11,6 +11,7 @@
  * project under specific licensing conditions. 
  */
 
+#include<ostream>
 #include"TFEL/Material/ModellingHypothesis.hxx"
 #include"MFront/MFrontLogStream.hxx"
 #include"MTest/RoundingMode.hxx"
