diff --git a/desktop/xfce/base/xfce4-panel/pspec.xml b/desktop/xfce/base/xfce4-panel/pspec.xml
index 0be9fa4f7f..ff2e16437b 100644
--- a/desktop/xfce/base/xfce4-panel/pspec.xml
+++ b/desktop/xfce/base/xfce4-panel/pspec.xml
@@ -32,6 +32,8 @@
libxml2-devel
libxslt-devel
gtk-doc
+ docbook-xml
+ docbook-xsl