diff --git a/dumux/implicit/mpnc/mpncvolumevariables.hh b/dumux/implicit/mpnc/mpncvolumevariables.hh
index 4d505991e1e24342ee5383b06a0261d88c33a836..9bf2c73bcac6c5837c64105b8c57bb38e92cf948 100644
--- a/dumux/implicit/mpnc/mpncvolumevariables.hh
+++ b/dumux/implicit/mpnc/mpncvolumevariables.hh
@@ -29,6 +29,7 @@
 #include "diffusion/volumevariables.hh"
 #include "energy/mpncvolumevariablesenergy.hh"
 #include "mass/mpncvolumevariablesmass.hh"
+#include "mpncindices.hh"
 #include "mpncvolumevariablesia.hh"
 
 #include <dumux/implicit/common/implicitvolumevariables.hh>