diff --git a/src/Mod/Path/PathSimulator/App/VolSim.cpp b/src/Mod/Path/PathSimulator/App/VolSim.cpp
index ce9490869d..9fb45a31bf 100644
--- a/src/Mod/Path/PathSimulator/App/VolSim.cpp
+++ b/src/Mod/Path/PathSimulator/App/VolSim.cpp
@@ -23,6 +23,7 @@
#include "PreCompiled.h"
#include
+#include
#include
#include
#include