1 files changed, 1 insertions, 1 deletions
diff --git a/src/compiler/scala/tools/nsc/backend/icode/TypeStacks.scala b/src/compiler/scala/tools/nsc/backend/icode/TypeStacks.scala
index 1f0f8b887c..69f1f34cb7 100644
--- a/src/compiler/scala/tools/nsc/backend/icode/TypeStacks.scala
+++ b/src/compiler/scala/tools/nsc/backend/icode/TypeStacks.scala
@@ -9,7 +9,7 @@ package scala.tools.nsc.backend.icode;
 
 import scala.tools.nsc.backend.icode.Primitives;
 
-trait TypeStacks: ICodes {
+trait TypeStacks requires ICodes {
   import opcodes._;
   import global.{Symbol, Type, definitions};