diff --git a/main/src/main/scala/sbt/Cross.scala b/main/src/main/scala/sbt/Cross.scala
index 76487ade4..3f9bca63a 100644
--- a/main/src/main/scala/sbt/Cross.scala
+++ b/main/src/main/scala/sbt/Cross.scala
@@ -274,7 +274,7 @@ object Cross {
       excluded.foreach(logProject.tupled)
     }
 
-    val projects: Seq[Reference] = {
+    val projects: Seq[ResolvedReference] = {
       val projectScalaVersions =
         structure.allProjectRefs.map(proj => proj -> crossVersions(extracted, proj))
       if (switch.version.force) {