diff --git a/types.hpp b/types.hpp
index e194c94..d701cfc 100644
--- a/types.hpp
+++ b/types.hpp
@@ -34,6 +34,8 @@
 using EntityInstance = uint16_t;
 using ContainerID = uint16_t;
 using CompositeCount = uint8_t;
+using SensorOffset = uint8_t;
+using EventState = uint8_t;
 
 //!< Subset of the State Set that is supported by a effecter/sensor
 using PossibleStates = std::set<uint8_t>;