diff --git a/common/types.hpp b/common/types.hpp
index d701cfc..c2b3510 100644
--- a/common/types.hpp
+++ b/common/types.hpp
@@ -27,8 +27,9 @@
 namespace pdr
 {
 
+using EID = uint8_t;
 using TerminusHandle = uint16_t;
-using TerminusID = uint16_t;
+using TerminusID = uint8_t;
 using SensorID = uint16_t;
 using EntityType = uint16_t;
 using EntityInstance = uint16_t;