diff --git a/compile/interface/API.scala b/compile/interface/API.scala
index af72e9a66..3c174201f 100644
--- a/compile/interface/API.scala
+++ b/compile/interface/API.scala
@@ -273,9 +273,9 @@ final class API(val global: Global, val callback: xsbti.AnalysisCallback) extend
 	}
 	private def getModifiers(s: Symbol): xsbti.api.Modifiers =
 	{
-		import Flags._; val MACRO = 0x00008000 // From Flags.MACRO in 2.10.0+
+		import Flags._
 		new xsbti.api.Modifiers(s.hasFlag(ABSTRACT) || s.hasFlag(DEFERRED), s.hasFlag(OVERRIDE),
-			s.isFinal, s.hasFlag(SEALED), isImplicit(s), s.hasFlag(LAZY), s.hasFlag(MACRO))
+			s.isFinal, s.hasFlag(SEALED), isImplicit(s), s.hasFlag(LAZY), hasMacro(s))
 	}
 
 	private def isImplicit(s: Symbol) = s.hasFlag(Flags.IMPLICIT)
diff --git a/compile/interface/Analyzer.scala b/compile/interface/Analyzer.scala
index b4d2dd65d..32c79d764 100644
--- a/compile/interface/Analyzer.scala
+++ b/compile/interface/Analyzer.scala
@@ -130,12 +130,21 @@ abstract class Compat
 		def LOCALCHILD = sourceCompatibilityOnly
 
 		def NullaryMethodType = NullaryMethodTpe
+
+		def MACRO = DummyValue
 	}
 	// in 2.9, NullaryMethodType was added to Type
 	object NullaryMethodTpe {
 		def unapply(t: Type): Option[Type] = None
 	}
 
+	val DummyValue = 0
+	def hasMacro(s: Symbol): Boolean =
+	{
+		val MACRO = Flags.MACRO // will be DummyValue for versions before 2.10
+	  MACRO != DummyValue && s.hasFlag(MACRO)
+	}
+
 	private[this] def sourceCompatibilityOnly: Nothing = throw new RuntimeException("For source compatibility only: should not get here.")
 
 	private[this] final implicit def miscCompat(n: AnyRef): MiscCompat = new MiscCompat