diff --git a/main/src/main/scala/sbt/PluginCross.scala b/main/src/main/scala/sbt/PluginCross.scala
index f6fd033ee..1092b41ad 100644
--- a/main/src/main/scala/sbt/PluginCross.scala
+++ b/main/src/main/scala/sbt/PluginCross.scala
@@ -102,6 +102,7 @@ private[sbt] object PluginCross {
       case VersionNumber(Seq(0, 12, _*), _, _) => "2.9.2"
       case VersionNumber(Seq(0, 13, _*), _, _) => "2.10.7"
       case VersionNumber(Seq(1, 0, _*), _, _)  => "2.12.20"
+      case VersionNumber(Seq(2, _*), _, _)     => "3.7.3"
       case _                                   => sys.error(s"Unsupported sbt binary version: $sv")
     }
 }