diff --git a/include/sys/spa.h b/include/sys/spa.h
index f0f77cd853..67de57980f 100644
--- a/include/sys/spa.h
+++ b/include/sys/spa.h
@@ -733,10 +733,16 @@ typedef enum spa_mode {
  * Send TRIM commands in-line during normal pool operation while deleting.
  *	OFF: no
  *	ON: yes
+ * NB: IN_FREEBSD_BASE is defined within the FreeBSD sources.
  */
 typedef enum {
 	SPA_AUTOTRIM_OFF = 0,	/* default */
-	SPA_AUTOTRIM_ON
+	SPA_AUTOTRIM_ON,
+#ifdef IN_FREEBSD_BASE
+	SPA_AUTOTRIM_DEFAULT = SPA_AUTOTRIM_ON,
+#else
+	SPA_AUTOTRIM_DEFAULT = SPA_AUTOTRIM_OFF,
+#endif
 } spa_autotrim_t;
 
 /*
diff --git a/module/zcommon/zpool_prop.c b/module/zcommon/zpool_prop.c
index 3cfb435e42..815fad6df0 100644
--- a/module/zcommon/zpool_prop.c
+++ b/module/zcommon/zpool_prop.c
@@ -129,7 +129,7 @@ zpool_prop_init(void)
 	    ZIO_FAILURE_MODE_WAIT, PROP_DEFAULT, ZFS_TYPE_POOL,
 	    "wait | continue | panic", "FAILMODE", failuremode_table);
 	zprop_register_index(ZPOOL_PROP_AUTOTRIM, "autotrim",
-	    SPA_AUTOTRIM_OFF, PROP_DEFAULT, ZFS_TYPE_POOL,
+	    SPA_AUTOTRIM_DEFAULT, PROP_DEFAULT, ZFS_TYPE_POOL,
 	    "on | off", "AUTOTRIM", boolean_table);
 
 	/* hidden properties */