1 files changed, 4 insertions, 0 deletions
diff --git a/sources/scala/tools/nsc/CompilationUnits.scala b/sources/scala/tools/nsc/CompilationUnits.scala
index e0793a6d9c..0c39d99c16 100644
--- a/sources/scala/tools/nsc/CompilationUnits.scala
+++ b/sources/scala/tools/nsc/CompilationUnits.scala
@@ -7,6 +7,8 @@ package scala.tools.nsc;
 
 import scala.tools.nsc.util.{SourceFile, Position};
 import scala.tools.nsc.util.FreshNameCreator;
+import scala.tools.util.AbstractFile;
+import scala.collection.mutable.HashSet;
 
 [_trait_] abstract class CompilationUnits: Global {
 
@@ -21,6 +23,8 @@ import scala.tools.nsc.util.FreshNameCreator;
     /** the content of the compilation unit in tree form */
     var body: Tree = EmptyTree;
 
+    val depends = new HashSet[AbstractFile];
+
     def position(pos: int) = new Position(source, pos);
 
     def error(pos: int, msg: String) = reporter.error(position(pos), msg);