diff --git a/project/common.scala b/project/common.scala
index cdcd1aa..a878bab 100644
--- a/project/common.scala
+++ b/project/common.scala
@@ -86,6 +86,7 @@ object Common {
         Nil
       } else {
         Seq(
+          "-Xsource:3",
           "-Xlint"
         )
       }