diff --git a/main.go b/main.go
index f667ba2..2766929 100644
--- a/main.go
+++ b/main.go
@@ -72,6 +72,9 @@ var (
 	flJSON = cli.BoolFlag{
 		Name:  "json",
 		Usage: "Print output as JSON"}
+	flIsXMLExtension = cli.BoolFlag{
+		Name:  "is-xml-extension",
+		Usage: "Set if this is an XML extension, i.e. PaaS"}
 )
 
 func main() {
@@ -139,7 +142,7 @@ func main() {
 			Action: replicationStatus},
 		{Name: "unpublish-version",
 			Usage:  "Marks the specified version of the extension internal. Does not delete.",
-			Flags:  []cli.Flag{flMgtURL, flSubsID, flSubsCert, flNamespace, flName, flVersion},
+			Flags:  []cli.Flag{flMgtURL, flSubsID, flSubsCert, flNamespace, flName, flVersion, flIsXMLExtension},
 			Action: unpublishVersion},
 		{Name: "delete-version",
 			Usage:  "Deletes the extension version. It should be unpublished first.",
diff --git a/unpublish.go b/unpublish.go
index 2b78e98..989e366 100644
--- a/unpublish.go
+++ b/unpublish.go
@@ -16,16 +16,24 @@ func unpublishVersion(c *cli.Context) {
 		Name:      checkFlag(c, flName.Name),
 		Version:   checkFlag(c, flVersion.Name)}
 
-	unpublishManifestXML := `<?xml version="1.0" encoding="utf-8" ?>
+	isXMLExtension := c.Bool(flIsXMLExtension.Name)
+	buf := bytes.NewBufferString(`<?xml version="1.0" encoding="utf-8" ?>
 <ExtensionImage xmlns="http://schemas.microsoft.com/windowsazure"  xmlns:i="http://www.w3.org/2001/XMLSchema-instance">
   <!-- WARNING: Ordering of fields matter in this file. -->
   <ProviderNameSpace>{{.Namespace}}</ProviderNameSpace>
   <Type>{{.Name}}</Type>
   <Version>{{.Version}}</Version>
   <IsInternalExtension>true</IsInternalExtension>
-  <IsJsonExtension>true</IsJsonExtension>
-</ExtensionImage>`
-	tpl, err := template.New("unregisterManifest").Parse(unpublishManifestXML)
+`)
+
+	// All extension should be a JSON extension.  The biggest offenders are
+	// PaaS extensions.
+	if !isXMLExtension {
+		buf.WriteString("<IsJsonExtension>true</IsJsonExtension>")
+	}
+
+	buf.WriteString("</ExtensionImage>")
+	tpl, err := template.New("unregisterManifest").Parse(buf.String())
 	if err != nil {
 		log.Fatalf("template parse error: %v", err)
 	}