diff --git a/compiler/src/dotty/tools/backend/jvm/BCodeSkelBuilder.scala b/compiler/src/dotty/tools/backend/jvm/BCodeSkelBuilder.scala
index 38e5617fc3d7..4f4caf36d92a 100644
--- a/compiler/src/dotty/tools/backend/jvm/BCodeSkelBuilder.scala
+++ b/compiler/src/dotty/tools/backend/jvm/BCodeSkelBuilder.scala
@@ -626,7 +626,7 @@ trait BCodeSkelBuilder extends BCodeHelpers {
         val nr =
           val sourcePos = tree.sourcePos
           (
-            if sourcePos.exists then sourcePos.finalPosition.line
+            if sourcePos.exists then sourcePos.source.positionInUltimateSource(sourcePos).line
             else ctx.source.offsetToLine(tree.span.point) // fallback
           ) + 1
 
diff --git a/compiler/src/dotty/tools/dotc/util/SourcePosition.scala b/compiler/src/dotty/tools/dotc/util/SourcePosition.scala
index 384d2f1fb2f3..a7358755043c 100644
--- a/compiler/src/dotty/tools/dotc/util/SourcePosition.scala
+++ b/compiler/src/dotty/tools/dotc/util/SourcePosition.scala
@@ -79,11 +79,6 @@ extends SrcPos, interfaces.SourcePosition, Showable {
     rec(this)
   }
 
-  def finalPosition: SourcePosition = {
-    source.positionInUltimateSource(this)
-  }
-
-
   override def toString: String =
     s"${if (source.exists) source.file.toString else "(no source)"}:$span"