diff --git a/module/zfs/metaslab.c b/module/zfs/metaslab.c
index 311465ebc..164b6b87e 100644
--- a/module/zfs/metaslab.c
+++ b/module/zfs/metaslab.c
@@ -137,12 +137,6 @@ uint64_t metaslab_df_alloc_threshold = SPA_MAXBLOCKSIZE;
  */
 int metaslab_df_free_pct = 4;
 
-/*
- * A metaslab is considered "free" if it contains a contiguous
- * segment which is greater than metaslab_min_alloc_size.
- */
-uint64_t metaslab_min_alloc_size = DMU_MAX_ACCESS;
-
 /*
  * Percentage of all cpus that can be used by the metaslab taskq.
  */