diff --git a/categories_map.py b/categories_map.py
index c3419353e100..adca97beb476 100644
--- a/categories_map.py
+++ b/categories_map.py
@@ -741,6 +741,7 @@
         "GeneratorInterface/AlpgenInterface",
         "GeneratorInterface/BeamHaloGenerator",
         "GeneratorInterface/CascadeInterface",
+        "GeneratorInterface/CepGenInterface",
         "GeneratorInterface/Configuration",
         "GeneratorInterface/Core",
         "GeneratorInterface/CosmicMuonGenerator",