diff --git a/src/gravity/Default/gravity.h b/src/gravity/Default/gravity.h
index 24dcfd7032c6c14dd7ce5c48f20186979988a079..eabc95fc7eb1e1d4039dc9cea6611f1d17451a37 100644
--- a/src/gravity/Default/gravity.h
+++ b/src/gravity/Default/gravity.h
@@ -24,6 +24,7 @@
 
 #include "cosmology.h"
 #include "gravity_properties.h"
+#include "kernel_gravity.h"
 #include "minmax.h"
 
 /**