diff --git a/contrib/tldp.spec b/contrib/tldp.spec
index 5a5533d..0dff8c5 100644
--- a/contrib/tldp.spec
+++ b/contrib/tldp.spec
@@ -26,6 +26,7 @@ Requires: docbook-utils-minimal
 Requires: docbook-dsssl-stylesheets
 Requires: docbook-xsl-stylesheets
 Requires: docbook5-xsl-stylesheets
+Requires: python-networkx
 
 %description
 tldp - tools for publishing from TLDP sources