diff --git a/src/midi_Defs.h b/src/midi_Defs.h
index 654eb8d..2da35e5 100644
--- a/src/midi_Defs.h
+++ b/src/midi_Defs.h
@@ -88,10 +88,10 @@ struct Thru
 {
     enum Mode
     {
-        off                   = 0,  ///< Thru disabled (nothing passes through).
-        full                  = 1,  ///< Fully enabled Thru (every incoming message is sent back).
-        sameChannel           = 2,  ///< Only the messages on the Input Channel will be sent back.
-        differentChannel      = 3,  ///< All the messages but the ones on the Input Channel will be sent back.
+        Off                   = 0,  ///< Thru disabled (nothing passes through).
+        Full                  = 1,  ///< Fully enabled Thru (every incoming message is sent back).
+        SameChannel           = 2,  ///< Only the messages on the Input Channel will be sent back.
+        DifferentChannel      = 3,  ///< All the messages but the ones on the Input Channel will be sent back.
     };
 };