diff --git a/keywords.txt b/keywords.txt
index ca6210a..efbf95a 100644
--- a/keywords.txt
+++ b/keywords.txt
@@ -28,6 +28,10 @@ AHT10	KEYWORD2
 # Constants	(LITERAL1)
 #######################################
 
+AHT10_SENSOR	LITERAL1
+AHT15_SENSOR	LITERAL1
+AHT20_SENSOR	LITERAL1
+
 AHT10_FORCE_READ_DATA	LITERAL1
 AHT10_USE_READ_DATA	LITERAL1