diff --git a/src/math/categories/categories.pysty3 b/src/math/categories/categories.pysty3
index 075ff84..c103ab2 100644
--- a/src/math/categories/categories.pysty3
+++ b/src/math/categories/categories.pysty3
@@ -41,6 +41,12 @@ __HEADER__(Definitions of categories with automatic indexing)%% Wrapper commands
       }
   }
 
+
+\NewDocumentCommand{\MakeCategoryIndex}{ }
+  {
+    \printindex[categories]
+  }
+
 \makeindex
   [
     name = categories,