diff --git a/Simulation/ISF/ISF_FastCaloSim/ISF_PunchThroughTools/src/PDFcreator.cxx b/Simulation/ISF/ISF_FastCaloSim/ISF_PunchThroughTools/src/PDFcreator.cxx
index 1de26ce52572486f1dacc279a60aa1c4aed91f37..5e2717a6436adf2459d4f0b1a320264c9b2ae3d5 100644
--- a/Simulation/ISF/ISF_FastCaloSim/ISF_PunchThroughTools/src/PDFcreator.cxx
+++ b/Simulation/ISF/ISF_FastCaloSim/ISF_PunchThroughTools/src/PDFcreator.cxx
@@ -9,6 +9,9 @@
 // class header
 #include "PDFcreator.h"
 
+// std
+#include <algorithm>
+
 // Random number generators
 #include "CLHEP/Random/RandFlat.h"