diff --git a/examples/main_fof.c b/examples/main_fof.c
index fce6ad74be5df49883d20a4f5396a48cf05c8234..72c096f5bb56cfc9c69da14812353a67c8ae9be2 100644
--- a/examples/main_fof.c
+++ b/examples/main_fof.c
@@ -993,7 +993,7 @@ int main(int argc, char *argv[]) {
 #endif
 
     /* Initialise the particles */
-    engine_init_particles(&e, flag_entropy_ICs, clean_smoothing_length_values, 0);
+    engine_init_particles(&e, flag_entropy_ICs, clean_smoothing_length_values, 1);
 
     /* Perform first FOF search after the first snapshot dump. */
     fof_search_tree(&s);