diff --git a/main/src/main/scala/sbt/Defaults.scala b/main/src/main/scala/sbt/Defaults.scala
index 2f06f890e..5a491f973 100644
--- a/main/src/main/scala/sbt/Defaults.scala
+++ b/main/src/main/scala/sbt/Defaults.scala
@@ -3786,7 +3786,7 @@ object Classpaths {
 
   private[sbt] def isScala2Scala3Sandwich(sbv1: String, sbv2: String): Boolean = {
     def compare(a: String, b: String): Boolean =
-      a == "2.13" && (b.startsWith("0.") || b.startsWith("3.0"))
+      a == "2.13" && (b.startsWith("0.") || b.startsWith("3"))
     compare(sbv1, sbv2) || compare(sbv2, sbv1)
   }