diff --git a/project/Build.scala b/project/Build.scala
index 5773fab61cdb..ef6781ee199f 100644
--- a/project/Build.scala
+++ b/project/Build.scala
@@ -828,7 +828,7 @@ object Build {
         if (isRelease) {
           val baseURI = (LocalRootProject / baseDirectory).value.toURI
           val dottyVersion = version.value
-          Seq(s"-scalajs-mapSourceURI:$baseURI->$dottyGithubRawUserContentUrl/v$dottyVersion/")
+          Seq(s"-scalajs-mapSourceURI:$baseURI->$dottyGithubRawUserContentUrl/$dottyVersion/")
         } else {
           Nil
         }