diff --git a/runtime/doc/textprop.txt b/runtime/doc/textprop.txt
index 0d830f6..14fe297 100644
--- a/runtime/doc/textprop.txt
+++ b/runtime/doc/textprop.txt
@@ -338,6 +338,8 @@
 		   text		text to be displayed before {col}.  Only
 				present for |virtual-text| properties.
 		   text_align	alignment property of |virtual-text|.
+		   text_padding_left
+				left padding used for virtual text.
 		   text_wrap	specifies whether |virtual-text| is wrapped.
 		   type		name of the property type, omitted if
 				the type was deleted