diff --git a/lib/system.nim b/lib/system.nim
index a5356cb540..358aae938c 100644
--- a/lib/system.nim
+++ b/lib/system.nim
@@ -160,7 +160,7 @@ when defined(nimHashOrdinalFixed):
                                    ## as well as their subtypes. See also
                                    ## `SomeOrdinal`.
 else:
-  # bootstrap <= 0.20.0
+  # bootstrap < 1.2.0
   type
     OrdinalImpl[T] {.magic: Ordinal.}
     Ordinal* = OrdinalImpl | uint | uint64