diff --git a/indra/llui/llsliderctrl.h b/indra/llui/llsliderctrl.h
index 93ab387ea581dcb37f29cdf38ab195456a522b1c..767c554c1b1f5dd08288b08a3c2c4d0a8cdb9695 100644
--- a/indra/llui/llsliderctrl.h
+++ b/indra/llui/llsliderctrl.h
@@ -45,7 +45,6 @@ class LLSliderCtrl: public LLF32UICtrl, public ll::ui::SearchableControl
 		Optional<S32>			text_width;
 		Optional<bool>			show_text;
 		Optional<bool>			can_edit_text;
-		Optional<bool>			is_volume_slider;
 		Optional<S32>			decimal_digits;
 
 		Optional<LLUIColor>		text_color,
@@ -64,7 +63,6 @@ class LLSliderCtrl: public LLF32UICtrl, public ll::ui::SearchableControl
 			label_width("label_width"),
 			show_text("show_text"),
 			can_edit_text("can_edit_text"),
-			is_volume_slider("volume"),
 			decimal_digits("decimal_digits", 3),
 			text_color("text_color"),
 			text_disabled_color("text_disabled_color"),