diff --git a/network/web/firefox/pspec.xml b/network/web/firefox/pspec.xml
index 01f85a34f8..18342865e5 100644
--- a/network/web/firefox/pspec.xml
+++ b/network/web/firefox/pspec.xml
@@ -58,6 +58,7 @@
             <Dependency>alsa-lib-devel</Dependency>
             <Dependency>libevent-devel</Dependency>
             <Dependency>xorg-app-devel</Dependency>
+            <Dependency>libXrandr-devel</Dependency>
             <Dependency>libnotify-devel</Dependency>
             <Dependency>dbus-glib-devel</Dependency>
             <Dependency>xkeyboard-config</Dependency>
@@ -116,6 +117,7 @@
             <Dependency>gdk-pixbuf</Dependency>
             <Dependency>libXdamage</Dependency>
             <Dependency>libXrender</Dependency>
+            <Dependency>libXrandr</Dependency>
             <Dependency>libXcomposite</Dependency>
             <Dependency>libjpeg-turbo</Dependency>
             <Dependency>startup-notification</Dependency>