diff --git a/build/tools/roomservice.py b/build/tools/roomservice.py
index 9a2ba14a..bc860cae 100755
--- a/build/tools/roomservice.py
+++ b/build/tools/roomservice.py
@@ -192,8 +192,12 @@ def add_to_manifest(repositories):
         lm.append(project)
 
     ElementTree.indent(lm)
-    tree = ElementTree.ElementTree(lm)
-    tree.write('.repo/local_manifests/roomservice.xml', encoding='UTF-8', xml_declaration=True)
+    raw_xml = ElementTree.tostring(lm).decode()
+    raw_xml = '<?xml version="1.0" encoding="UTF-8"?>\n' + raw_xml
+
+    f = open('.repo/local_manifests/roomservice.xml', 'w')
+    f.write(raw_xml)
+    f.close()
 
 def fetch_dependencies(repo_path):
     print('Looking for dependencies in %s' % repo_path)