From ff1392d1b7e904b51f3877a28d8bf0878f9f0d61 Mon Sep 17 00:00:00 2001
From: John Helly <j.c.helly@durham.ac.uk>
Date: Fri, 13 Nov 2020 15:15:11 +0000
Subject: [PATCH] Only require black hole seed mass if seeding black holes

---
 src/fof.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/fof.c b/src/fof.c
index cac371c096..511477bce7 100644
--- a/src/fof.c
+++ b/src/fof.c
@@ -136,7 +136,7 @@ void fof_init(struct fof_props *props, struct swift_params *params,
   if (props->l_x_ratio <= 0. && props->l_x_absolute == -1.)
     error("The FOF linking length ratio can't be negative!");
 
-  if (!stand_alone_fof) {
+  if (!stand_alone_fof && props->seed_black_holes_enabled) {
 
     /* Read the minimal halo mass for black hole seeding */
     props->seed_halo_mass =
-- 
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