diff --git a/lib/pure/algorithm.nim b/lib/pure/algorithm.nim
index 32bf9eb98e..b6bcdab7e9 100644
--- a/lib/pure/algorithm.nim
+++ b/lib/pure/algorithm.nim
@@ -240,8 +240,6 @@ template sortedByIt*(seq1, op: expr): expr =
 proc isSorted*[T](a: openarray[T],
                  cmp: proc(x, y: T): int {.closure.},
                  order = SortOrder.Ascending): bool =
-  if len(a) <= 1: return true
-
   result = true
   for i in 0..<len(a)-1:
     if cmp(a[i],a[i+1]) * order > 0: