diff --git a/examples/main_fof.c b/examples/main_fof.c
index 00351305d7cb578812e5675175c61d2fe11fe29c..0817ac4bd8e61542ff0a3483abc93b63d3362761 100644
--- a/examples/main_fof.c
+++ b/examples/main_fof.c
@@ -652,7 +652,7 @@ int main(int argc, char *argv[]) {
       /*sink_properties=*/NULL, &neutrino_properties,
       /*neutrino_response=*/NULL, /*feedback_properties=*/NULL,
       /*pressure_floor_properties=*/NULL,
-      /*rt_properties=*/NULL, &mesh, /*potential=*/NULL,
+      /*rt_properties=*/NULL, &mesh, /*pow_data=*/NULL, /*potential=*/NULL,
       /*cooling_func=*/NULL, /*starform=*/NULL, /*chemistry=*/NULL,
       /*extra_io_props=*/NULL, &fof_properties, /*los_properties=*/NULL,
       /*lightcone_properties=*/NULL, &ics_metadata);