diff --git a/src/engine.c b/src/engine.c
index aacaa4a89ccf6898a709e1013b47d2114ce29c2f..c16ac39f2d31111b329d7d780f12c8fa428ff453 100644
--- a/src/engine.c
+++ b/src/engine.c
@@ -4198,6 +4198,10 @@ void engine_init_particles(struct engine *e, int flag_entropy_ICs,
   space_init_parts(s, e->verbose);
   space_init_gparts(s, e->verbose);
 
+  message("Performing Friends Of Friends search.");
+  fof_search(e);
+  message("Friends Of Friends search finished.");
+
   /* Now, launch the calculation */
   TIMER_TIC;
   engine_launch(e);
diff --git a/src/engine.h b/src/engine.h
index 4c37aab593fdffc5f68ea16cb83b29ad782debf0..de06e5baf9348fdcc045e35d247bf370c8ed27ae 100644
--- a/src/engine.h
+++ b/src/engine.h
@@ -48,6 +48,7 @@
 #include "space.h"
 #include "task.h"
 #include "units.h"
+#include "fof.h"
 
 /**
  * @brief The different policies the #engine can follow.