diff --git a/network/web/firefox/pspec.xml b/network/web/firefox/pspec.xml
index d585cc0c1e..57b6d0e07e 100644
--- a/network/web/firefox/pspec.xml
+++ b/network/web/firefox/pspec.xml
@@ -74,6 +74,7 @@
             <Dependency>pango</Dependency>
             <Dependency>libX11</Dependency>
             <Dependency>libffi</Dependency>
+            <Dependency>libxcb</Dependency>
             <Dependency>libgcc</Dependency>
             <Dependency>libpng</Dependency>
             <Dependency>pixman</Dependency>