1 files changed, 5 insertions, 0 deletions
diff --git a/src/compiler/scala/tools/nsc/settings/Warnings.scala b/src/compiler/scala/tools/nsc/settings/Warnings.scala
index 6fbd9892c7..b11c6f00ee 100644
--- a/src/compiler/scala/tools/nsc/settings/Warnings.scala
+++ b/src/compiler/scala/tools/nsc/settings/Warnings.scala
@@ -54,4 +54,9 @@ trait Warnings {
   val warnInaccessible     = BooleanSetting   ("-Ywarn-inaccessible", "Warn about inaccessible types in method signatures.")
   val warnNullaryOverride  = BooleanSetting   ("-Ywarn-nullary-override",
     "Warn when non-nullary overrides nullary, e.g. `def foo()` over `def foo`.")
+
+  // Backward compatibility.
+  def Xwarnfatal    = fatalWarnings
+  def Xchecknull    = warnSelectNullable
+  def Ywarndeadcode = warnDeadCode
 }