diff --git a/keywords.txt b/keywords.txt
index 36bfb988..e0b30547 100644
--- a/keywords.txt
+++ b/keywords.txt
@@ -124,6 +124,7 @@ setSyncWord	KEYWORD2
 setOutputPower	KEYWORD2
 setCurrentLimit	KEYWORD2
 setPreambleLength	KEYWORD2
+setPreamblePolarity KEYWORD2
 setGain	KEYWORD2
 getFrequencyError	KEYWORD2
 getRSSI	KEYWORD2