diff --git a/keywords.txt b/keywords.txt
index 3e9ccc3..2831dae 100644
--- a/keywords.txt
+++ b/keywords.txt
@@ -20,7 +20,10 @@ setPWM	KEYWORD2
 setPin	KEYWORD2
 readPrescale	KEYWORD2
 writeMicroseconds	KEYWORD2
+setOscillatorFrequency	KEYWORD2
+getOscillatorFrequency	KEYWORD2
 
 #######################################
 # Constants (LITERAL1)
 #######################################
+FREQUENCY_OSCILLATOR  LITERAL1