diff --git a/layout/style/nsCSSKeywordList.h b/layout/style/nsCSSKeywordList.h
index 5c0057aa76..1affe1024d 100644
--- a/layout/style/nsCSSKeywordList.h
+++ b/layout/style/nsCSSKeywordList.h
@@ -197,6 +197,7 @@ CSS_KEY(collapse, collapse)
 CSS_KEY(color, color)
 CSS_KEY(color-burn, color_burn)
 CSS_KEY(color-dodge, color_dodge)
+CSS_KEY(color-mix, color_mix)
 CSS_KEY(common-ligatures, common_ligatures)
 CSS_KEY(column, column)
 CSS_KEY(column-reverse, column_reverse)
@@ -312,6 +313,7 @@ CSS_KEY(horizontal, horizontal)
 CSS_KEY(horizontal-tb, horizontal_tb)
 CSS_KEY(hue, hue)
 CSS_KEY(hue-rotate, hue_rotate)
+CSS_KEY(hsl, hsl)
 CSS_KEY(hz, hz)
 CSS_KEY(icon, icon)
 CSS_KEY(ignore, ignore)