diff --git a/Documentation/devicetree/bindings/sound/simple-card.txt b/Documentation/devicetree/bindings/sound/simple-card.txt
index 72d94b7aa5f5..c3cba600bf11 100644
--- a/Documentation/devicetree/bindings/sound/simple-card.txt
+++ b/Documentation/devicetree/bindings/sound/simple-card.txt
@@ -17,9 +17,9 @@ Optional properties:
 					  source.
 - simple-audio-card,mclk-fs             : Multiplication factor between stream rate and codec
   					  mclk.
-- simple-audio-card,hp_det_gpio		: Reference to GPIO that signals when
+- simple-audio-card,hp-det-gpio		: Reference to GPIO that signals when
 					  headphones are attached.
-- simple-audio-card,mic_det_gpio	: Reference to GPIO that signals when
+- simple-audio-card,mic-det-gpio	: Reference to GPIO that signals when
 					  a microphone is attached.
 
 Optional subnodes: