diff --git a/compile/interface/src/main/scala/xsbt/Compat.scala b/compile/interface/src/main/scala/xsbt/Compat.scala
index 7b0eeb1e0..27d2b6cd5 100644
--- a/compile/interface/src/main/scala/xsbt/Compat.scala
+++ b/compile/interface/src/main/scala/xsbt/Compat.scala
@@ -149,7 +149,7 @@ abstract class Compat {
           import analyzer._ // this is where MEA lives in 2.11.x
           tree.attachments.all.collect {
             case att: MacroExpansionAttachment => att.expandee
-          } headOption
+          }.headOption
         }
       }
     }