diff --git a/build/shared/lib/keywords.txt b/build/shared/lib/keywords.txt
index fc190f18322..637f9a07698 100644
--- a/build/shared/lib/keywords.txt
+++ b/build/shared/lib/keywords.txt
@@ -126,6 +126,7 @@ noInterrupts	KEYWORD2	NoInterrupts
 noTone	KEYWORD2	NoTone
 pinMode	KEYWORD2	PinMode
 pulseIn	KEYWORD2	PulseIn
+pulseInLong	KEYWORD2	PulseInLong
 shiftIn	KEYWORD2	ShiftIn
 shiftOut	KEYWORD2	ShiftOut
 tone	KEYWORD2	Tone