diff --git a/main/src/main/scala/sbt/internal/LintUnused.scala b/main/src/main/scala/sbt/internal/LintUnused.scala
index e2c2f29fc..a8cafe419 100644
--- a/main/src/main/scala/sbt/internal/LintUnused.scala
+++ b/main/src/main/scala/sbt/internal/LintUnused.scala
@@ -36,6 +36,7 @@ object LintUnused {
       onLoadMessage,
       onUnload,
       sbt.nio.Keys.watchTriggers,
+      serverConnectionType,
     ),
     includeLintKeys := Set(
       scalacOptions,