Index: game/modules/tome/dialogs/CharacterSheet.lua
===================================================================
--- game/modules/tome/dialogs/CharacterSheet.lua	(revision 3914)
+++ game/modules/tome/dialogs/CharacterSheet.lua	(working copy)
@@ -394,7 +394,7 @@
 		if text then
 			self:mouseTooltip(self.TOOLTIP_VISION_SIGHT,  s:drawColorStringBlended(self.font, ("Vision range   : #00ff00#%s"):format(text), w, h, 255, 255, 255, true)) h = h + self.font_h
 		end
-		text = compare_fields(player, actor_to_compare, "infravision", "%d", "%+.0f")
+		text = compare_fields(player, actor_to_compare, function(actor) return (actor:attr("infravision") or actor:attr("heightened_senses")) and (actor.heightened_senses or 0) + (actor.infravision or 0) end, "%d", "%+.0f")
 		if text then
 			self:mouseTooltip(self.TOOLTIP_VISION_INFRA,  s:drawColorStringBlended(self.font, ("Infravision    : #00ff00#%s"):format(text), w, h, 255, 255, 255, true)) h = h + self.font_h
 		end