diff --git a/ivy/CustomPomParser.scala b/ivy/CustomPomParser.scala
index 8f64fd950..9135cab41 100644
--- a/ivy/CustomPomParser.scala
+++ b/ivy/CustomPomParser.scala
@@ -64,7 +64,7 @@ object CustomPomParser
 			// Fixes up the detected extension in some cases missed by Ivy.
 		val convertArtifacts = artifactExtIncorrect(md)
 
-		val unqualify = filtered - ExtraAttributesKey
+		val unqualify = (filtered - ExtraAttributesKey) map { case (k,v) => ("e:" + k, v) }
 		if(unqualify.isEmpty && extraDepAttributes.isEmpty && !convertArtifacts)
 			md
 		else
@@ -168,6 +168,7 @@ object CustomPomParser
 		for(l <- md.getLicenses) dmd.addLicense(l)
 		for( (key,value) <- md.getExtraInfo.asInstanceOf[java.util.Map[String,String]].asScala ) dmd.addExtraInfo(key, value)
 		for( (key, value) <- md.getExtraAttributesNamespaces.asInstanceOf[java.util.Map[String,String]].asScala ) dmd.addExtraAttributeNamespace(key, value)
+		IvySbt.addExtraNamespace(dmd)
 		for( dd <- md.getDependencies ) dmd.addDependency(addExtra(dd, dependencyExtra))
 
 		for( ed <- md.getInheritedDescriptors) dmd.addInheritedDescriptor( new DefaultExtendsDescriptor( mrid, resolvedMrid, ed.getLocation, ed.getExtendsTypes) )
diff --git a/ivy/Ivy.scala b/ivy/Ivy.scala
index 0c378c899..b59f639a8 100644
--- a/ivy/Ivy.scala
+++ b/ivy/Ivy.scala
@@ -130,7 +130,7 @@ final class IvySbt(val configuration: IvyConfiguration)
 					case ifc: IvyFileConfiguration => configureIvyFile(ifc)
 				}
 			moduleSettings.ivyScala.foreach(IvyScala.checkModule(baseModule, baseConfiguration))
-			baseModule.getExtraAttributesNamespaces.asInstanceOf[java.util.Map[String,String]].put("e", "http://ant.apache.org/ivy/extra")
+			IvySbt.addExtraNamespace(baseModule)
 			(baseModule, baseConfiguration)
 		}
 		private def configureInline(ic: InlineConfiguration, log: Logger) =
@@ -286,6 +286,9 @@ private object IvySbt
 		import configuration._
 		new IvyConfig(name, if(isPublic) PUBLIC else PRIVATE, description, extendsConfigs.map(_.name).toArray, transitive, null)
 	}
+	def addExtraNamespace(dmd: DefaultModuleDescriptor): Unit =
+		dmd.addExtraAttributeNamespace("e", "http://ant.apache.org/ivy/extra")
+
 	/** Adds the ivy.xml main artifact. */
 	private def addMainArtifact(moduleID: DefaultModuleDescriptor)
 	{