diff --git a/components/style/properties/longhand/inherited_text.mako.rs b/components/style/properties/longhand/inherited_text.mako.rs
index 260e6fe5365..bddc1ea10c7 100644
--- a/components/style/properties/longhand/inherited_text.mako.rs
+++ b/components/style/properties/longhand/inherited_text.mako.rs
@@ -1274,9 +1274,6 @@ ${helpers.single_keyword("ruby-position", "over under",
 // CSS Writing Modes Module Level 3
 // https://drafts.csswg.org/css-writing-modes-3/
 
-// The spec has "digits <integer>?" value in addition. But that value is
-// at-risk, and Gecko's layout code doesn't support that either. So we
-// can just take the easy way for now.
 ${helpers.single_keyword("text-combine-upright", "none all",
                          products="gecko", animation_type="none",
                          spec="https://drafts.csswg.org/css-writing-modes-3/#text-combine-upright")}