diff --git a/Cantera/cxx/include/equilibrium.h b/Cantera/cxx/include/equilibrium.h
index 90267d7b3..30c558bb2 100755
--- a/Cantera/cxx/include/equilibrium.h
+++ b/Cantera/cxx/include/equilibrium.h
@@ -11,6 +11,7 @@
 #include "kernel/equil.h"
 #include "kernel/ChemEquil.h"
 #include "kernel/MultiPhaseEquil.h"
+#include "kernel/vcs_MultiPhaseEquil.h"
 #endif