diff --git a/src/space.c b/src/space.c
index 285b059be49098145dd10efef6d1c7b47e10983f..bcd9d49dab82a70dbcf20ebae86b8f666abdd6ac 100644
--- a/src/space.c
+++ b/src/space.c
@@ -5297,7 +5297,9 @@ void space_check_limiter_mapper(void *map_data, int nr_parts,
     if (parts[k].wakeup == time_bin_awake)
       error("Particle still woken up! id=%lld", parts[k].id);
 
-    if (parts[k].synchronized != 0) error("Synchronized particle not treated!");
+    if (parts[k].synchronized != 0)
+      error("Synchronized particle not treated! synchronized=%d",
+            parts[k].synchronized);
 
     if (parts[k].gpart != NULL)
       if (parts[k].time_bin != parts[k].gpart->time_bin)