diff --git a/mm/damon/reclaim.c b/mm/damon/reclaim.c
index 01f2f6cdbcdf..86da14778658 100644
--- a/mm/damon/reclaim.c
+++ b/mm/damon/reclaim.c
@@ -201,12 +201,6 @@ static int damon_reclaim_apply_parameters(void)
 	if (err)
 		return err;
 
-	/*
-	 * If monitor_region_start/end are unset, always silently
-	 * reset addr_unit to 1.
-	 */
-	if (!monitor_region_start && !monitor_region_end)
-		addr_unit = 1;
 	param_ctx->addr_unit = addr_unit;
 	param_ctx->min_region_sz = max(DAMON_MIN_REGION_SZ / addr_unit, 1);