diff --git a/changelog.md b/changelog.md
index 69e7ebfb8..4db405013 100644
--- a/changelog.md
+++ b/changelog.md
@@ -32,7 +32,7 @@
   and `ioselector_epoll` will no longer be leaked to child processes.
 
 ## Language changes
-- In newruntime it is now allowed to assign discriminator field without restrictions as long as case object doesn't have custom destructor. Discriminator value doesn't have to be a constant either. If you have custom destructor for case object and you do want to freely assign discriminator fields, it is recommended to refactor object into 2 objects like this: 
+- In newruntime it is now allowed to assign discriminator field without restrictions as long as case object doesn't have custom destructor. Discriminator value doesn't have to be a constant either. If you have custom destructor for case object and you do want to freely assign discriminator fields, it is recommended to refactor object into 2 objects like this:
   ```nim
   type
     MyObj = object
@@ -62,8 +62,8 @@
   ```
 
 - getImpl() on enum type symbols now returns field syms instead of idents. This helps
-  with writing typed macros. Old behavior for backwards compatiblity can be restored 
-  with command line switch `--oldast`.
+  with writing typed macros. Old behavior for backwards compatiblity can be restored
+  with command line switch `--useVersion:1.0`.
 
 ## Compiler changes
 
diff --git a/compiler/semtypes.nim b/compiler/semtypes.nim
index 7ede8e792..96fd6be05 100644
--- a/compiler/semtypes.nim
+++ b/compiler/semtypes.nim
@@ -131,7 +131,7 @@ proc semEnum(c: PContext, n: PNode, prev: PType): PType =
     e.typ = result
     e.position = int(counter)
     let symNode = newSymNode(e)
-    if optOldAst notin c.config.options and identToReplace != nil:
+    if optNimV1Emulation notin c.config.options and identToReplace != nil:
       identToReplace[] = symNode
     if e.position == 0: hasNull = true
     if result.sym != nil and sfExported in result.sym.flags:
@@ -1590,7 +1590,7 @@ proc applyTypeSectionPragmas(c: PContext; pragmas, operand: PNode): PNode =
         discard "User-defined pragma"
       else:
         let sym = searchInScopes(c, ident)
-        if sym != nil and sfCustomPragma in sym.flags: 
+        if sym != nil and sfCustomPragma in sym.flags:
           discard "Custom user pragma"
         else:
           # we transform ``(arg1, arg2: T) {.m, rest.}`` into ``m((arg1, arg2: T) {.rest.})`` and