diff --git a/src/processing.hpp b/src/processing.hpp
index 475133d..e37f279 100644
--- a/src/processing.hpp
+++ b/src/processing.hpp
@@ -1,6 +1,7 @@
 #pragma once
 
 #include "associations.hpp"
+#include "types.hpp"
 
 #include <boost/container/flat_map.hpp>
 #include <boost/container/flat_set.hpp>
@@ -43,17 +44,6 @@
     return (iface == assocDefsInterface) ? "Associations" : "associations";
 }
 
-/** @brief interface_map_type is the underlying datastructure the mapper uses.
- *
- * The 3 levels of map are
- * object paths
- *   connection names
- *      interface names
- */
-using interface_map_type = boost::container::flat_map<
-    std::string, boost::container::flat_map<
-                     std::string, boost::container::flat_set<std::string>>>;
-
 /** @brief InterfacesAdded represents the dbus data from the signal
  *
  * There are 2 pairs