diff --git a/package/x11/thunderbird/thunderbird.conf b/package/x11/thunderbird/thunderbird.conf
index d5aeec767..31586d9e5 100644
--- a/package/x11/thunderbird/thunderbird.conf
+++ b/package/x11/thunderbird/thunderbird.conf
@@ -45,5 +45,6 @@ EOT
 
 	moz_build
 	moz_install
+	moz_register
 }