diff --git a/sci-mathematics/singular/metadata.xml b/sci-mathematics/singular/metadata.xml
index 0deaba87eadc2..a2368c6ebc106 100644
--- a/sci-mathematics/singular/metadata.xml
+++ b/sci-mathematics/singular/metadata.xml
@@ -1,6 +1,10 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <!DOCTYPE pkgmetadata SYSTEM "https://www.gentoo.org/dtd/metadata.dtd">
 <pkgmetadata>
+  <maintainer type="person">
+    <email>mjo@gentoo.org</email>
+  </maintainer>
+
   <maintainer type="person" proxied="yes">
     <email>frp.bissey@gmail.com</email>
     <name>François Bissey</name>