diff --git a/ChemistryLib/PhreeqcIOData/ChemicalSystem.h b/ChemistryLib/PhreeqcIOData/ChemicalSystem.h
index 596c4ad2f63f5e566da37b9df8647bfe0f0c982e..e06f41a65eedbe33ea8eab01b3923fa930bf0390 100644
--- a/ChemistryLib/PhreeqcIOData/ChemicalSystem.h
+++ b/ChemistryLib/PhreeqcIOData/ChemicalSystem.h
@@ -17,11 +17,6 @@
 #include "EquilibriumReactant.h"
 #include "KineticReactant.h"
 
-namespace MeshLib
-{
-class Mesh;
-}
-
 namespace ChemistryLib
 {
 namespace PhreeqcIOData