diff --git a/examples/main_fof.c b/examples/main_fof.c
index 104f2563d16b12adb490e98c1269c1918bfd4ece..af0e482cafe16805250fabee16bbfdf14504e530 100644
--- a/examples/main_fof.c
+++ b/examples/main_fof.c
@@ -688,7 +688,7 @@ int main(int argc, char *argv[]) {
 
   /* Perform the FOF search */
   engine_fof(&e, /*dump_results=*/1, /*dump_debug=*/0, /*seed_black_holes=*/0,
-	     /*buffers allocated=*/1);
+             /*buffers allocated=*/1);
 
   /* Write output. */
   engine_dump_snapshot(&e);
diff --git a/src/engine.h b/src/engine.h
index cc911195a0e7210027636acb8b1df7a065c29360..248df75026519061f7e5f2944448d152eeddb809 100644
--- a/src/engine.h
+++ b/src/engine.h
@@ -635,7 +635,7 @@ int engine_estimate_nr_tasks(const struct engine *e);
 void engine_print_task_counts(const struct engine *e);
 void engine_fof(struct engine *e, const int dump_results,
                 const int dump_debug_results, const int seed_black_holes,
-		const int foreign_buffers_allocated);
+                const int foreign_buffers_allocated);
 void engine_activate_gpart_comms(struct engine *e);
 
 /* Function prototypes, engine_maketasks.c. */
diff --git a/src/engine_fof.c b/src/engine_fof.c
index b3dcced1735e946b8055eed246a761e6f57100d6..940143b852c0fac7a6cb737bf4a44800591e2158 100644
--- a/src/engine_fof.c
+++ b/src/engine_fof.c
@@ -106,11 +106,11 @@ void engine_activate_fof_tasks(struct engine *e) {
  * (including BH seed info)?
  * @param seed_black_holes Are we seeding black holes?
  * @param foreign_buffers_allocated Are the foreign buffers currently
- * allocated? 
+ * allocated?
  */
 void engine_fof(struct engine *e, const int dump_results,
                 const int dump_debug_results, const int seed_black_holes,
-		const int foreign_buffers_allocated) {
+                const int foreign_buffers_allocated) {
 
 #ifdef WITH_FOF
 
@@ -122,7 +122,7 @@ void engine_fof(struct engine *e, const int dump_results,
     space_free_foreign_parts(e->s, /*clear pointers=*/1);
 #endif
   }
-  
+
   /* Compute number of DM particles */
   const long long total_nr_baryons =
       e->total_nr_parts + e->total_nr_sparts + e->total_nr_bparts;
@@ -166,7 +166,7 @@ void engine_fof(struct engine *e, const int dump_results,
     engine_allocate_foreign_particles(e, /*fof=*/0);
 #endif
   }
-  
+
   if (engine_rank == 0)
     message("Complete FOF search took: %.3f %s.",
             clocks_from_ticks(getticks() - tic), clocks_getunit());
diff --git a/src/engine_io.c b/src/engine_io.c
index 37cc88b4c8d2848b3c0e7ba381dc2a130e6e4f72..f20f5f1991f467ea49486e8492027000a120126f 100644
--- a/src/engine_io.c
+++ b/src/engine_io.c
@@ -316,12 +316,12 @@ void engine_check_for_dumps(struct engine *e) {
         if ((e->policy & engine_policy_self_gravity) && e->s->periodic)
           pm_mesh_free(e->mesh);
 
-	/* Free the foreign particles to get more breathing space. 
-	 * If called, the FOF code itself will reallocate what it needs. */		   
+          /* Free the foreign particles to get more breathing space.
+           * If called, the FOF code itself will reallocate what it needs. */
 #ifdef WITH_MPI
         space_free_foreign_parts(e->s, /*clear_cell_pointers=*/1);
 #endif
-	
+
         /* Do we want FoF group IDs in the snapshot? */
         if (with_fof && e->snapshot_invoke_fof) {
           engine_fof(e, /*dump_results=*/1, /*dump_debug=*/0,
@@ -356,7 +356,7 @@ void engine_check_for_dumps(struct engine *e) {
         if ((e->policy & engine_policy_self_gravity) && e->s->periodic)
           pm_mesh_allocate(e->mesh);
 #ifdef WITH_MPI
-        engine_allocate_foreign_particles(e, /*fof=*/ 0);
+        engine_allocate_foreign_particles(e, /*fof=*/0);
 #endif
 
         /* ... and find the next output time */
diff --git a/src/fof.c b/src/fof.c
index 2a4fd9dc61171fe58657381a8ee9ef5104c41e41..d65bd032277886f0ccf2efe62bd4435b879e93d1 100644
--- a/src/fof.c
+++ b/src/fof.c
@@ -2519,10 +2519,9 @@ void fof_search_foreign_cells(struct fof_props *props, const struct space *s) {
         "took: %.3f %s.",
         clocks_from_ticks(getticks() - tic), clocks_getunit());
 
-
   /* Allocate buffers to receive the gpart fof information */
   engine_allocate_foreign_particles(e, /*fof=*/1);
-  
+
   /* Activate the tasks exchanging all the required gparts */
   engine_activate_gpart_comms(e);
 
@@ -2556,7 +2555,7 @@ void fof_search_foreign_cells(struct fof_props *props, const struct space *s) {
   /* Clean up memory. */
   swift_free("fof_cell_pairs", cell_pairs);
   space_free_foreign_parts(e->s, /*clear pointers=*/1);
-  
+
   if (verbose)
     message("Searching for foreign links took: %.3f %s.",
             clocks_from_ticks(getticks() - tic), clocks_getunit());