diff --git a/layout/style/nsCSSPseudoClassList.h b/layout/style/nsCSSPseudoClassList.h
index 196c5d9f26..f1ab538357 100644
--- a/layout/style/nsCSSPseudoClassList.h
+++ b/layout/style/nsCSSPseudoClassList.h
@@ -171,6 +171,7 @@ CSS_STATE_PSEUDO_CLASS(disabled, ":disabled", 0, "", NS_EVENT_STATE_DISABLED)
 CSS_STATE_PSEUDO_CLASS(enabled, ":enabled", 0, "", NS_EVENT_STATE_ENABLED)
 CSS_STATE_PSEUDO_CLASS(focus, ":focus", 0, "", NS_EVENT_STATE_FOCUS)
 CSS_STATE_PSEUDO_CLASS(focusWithin, ":focus-within", 0, "", NS_EVENT_STATE_FOCUS_WITHIN)
+CSS_STATE_PSEUDO_CLASS(focusVisible, ":focus-visible", 0, "", NS_EVENT_STATE_FOCUSRING)
 CSS_STATE_PSEUDO_CLASS(hover, ":hover", 0, "", NS_EVENT_STATE_HOVER)
 CSS_STATE_PSEUDO_CLASS(mozDragOver, ":-moz-drag-over", 0, "", NS_EVENT_STATE_DRAGOVER)
 CSS_STATE_PSEUDO_CLASS(target, ":target", 0, "", NS_EVENT_STATE_URLTARGET)