diff --git a/lm-core/src/main/scala/sbt/librarymanagement/ConfigurationExtra.scala b/lm-core/src/main/scala/sbt/librarymanagement/ConfigurationExtra.scala
index 8f6a4f743..a50ea2c58 100644
--- a/lm-core/src/main/scala/sbt/librarymanagement/ConfigurationExtra.scala
+++ b/lm-core/src/main/scala/sbt/librarymanagement/ConfigurationExtra.scala
@@ -105,9 +105,10 @@ private[sbt] object ConfigurationMacro:
     @tailrec
     def enclosingTerm(sym: Symbol): Symbol =
       sym match
-        case sym if sym.flags.is(Flags.Macro) => enclosingTerm(sym.owner)
-        case sym if !sym.isTerm               => enclosingTerm(sym.owner)
-        case _                                => sym
+        case sym if sym.flags.is(Flags.Macro)     => enclosingTerm(sym.owner)
+        case sym if sym.flags.is(Flags.Synthetic) => enclosingTerm(sym.owner)
+        case sym if !sym.isTerm                   => enclosingTerm(sym.owner)
+        case _                                    => sym
     val term = enclosingTerm(Symbol.spliceOwner)
     if !term.isValDef then
       report.error(
diff --git a/main-settings/src/main/scala/sbt/std/KeyMacro.scala b/main-settings/src/main/scala/sbt/std/KeyMacro.scala
index b18ced36e..962f66bdb 100644
--- a/main-settings/src/main/scala/sbt/std/KeyMacro.scala
+++ b/main-settings/src/main/scala/sbt/std/KeyMacro.scala
@@ -72,9 +72,10 @@ private[sbt] object KeyMacro:
     @tailrec
     def enclosingTerm0(sym: Symbol): Symbol =
       sym match
-        case sym if sym.flags.is(Flags.Macro) => enclosingTerm0(sym.owner)
-        case sym if !sym.isTerm               => enclosingTerm0(sym.owner)
-        case _                                => sym
+        case sym if sym.flags.is(Flags.Macro)     => enclosingTerm0(sym.owner)
+        case sym if sym.flags.is(Flags.Synthetic) => enclosingTerm0(sym.owner)
+        case sym if !sym.isTerm                   => enclosingTerm0(sym.owner)
+        case _                                    => sym
     enclosingTerm0(Symbol.spliceOwner)
 
   private def enclosingClass(using Quotes) =