diff --git a/keywords.txt b/keywords.txt
index 330c77c9..470c9232 100644
--- a/keywords.txt
+++ b/keywords.txt
@@ -111,6 +111,7 @@ Continue	LITERAL1
 ActiveSensing	LITERAL1
 SystemReset	LITERAL1
 InvalidType	LITERAL1
+Thru	LITERAL1
 Off	LITERAL1
 Full	LITERAL1
 SameChannel	LITERAL1