diff --git a/hardware/virtualization/flatpak/pspec.xml b/hardware/virtualization/flatpak/pspec.xml
index 7e837a3d77..ba6c77a63f 100644
--- a/hardware/virtualization/flatpak/pspec.xml
+++ b/hardware/virtualization/flatpak/pspec.xml
@@ -13,6 +13,7 @@
         <Description>Linux application sandboxing and distribution framework, formerly xdg-app</Description>
         <Archive sha1sum="55ae93e8f912337a3c9e009453a8b0cfede745c4" type="tarxz">https://github.com/flatpak/flatpak/releases/download/1.4.4/flatpak-1.4.4.tar.xz</Archive>
         <BuildDependencies>
+            <Dependency>xmlto</Dependency>
             <Dependency>util-linux</Dependency>
             <Dependency>gtk-doc</Dependency>
             <Dependency>libcap-devel</Dependency>