--- a/servo/components/style/restyle_hints.rs
+++ b/servo/components/style/restyle_hints.rs
@@ -45,17 +45,17 @@ bitflags! {
 
         /// Rerun selector matching on all later siblings of the element and all
         /// of their descendants.
         const RESTYLE_LATER_SIBLINGS = 0x08,
 
         /// Don't re-run selector-matching on the element, only the style
         /// attribute has changed, and this change didn't have any other
         /// dependencies.
-        const RESTYLE_STYLE_ATTRIBUTE = 0x80,
+        const RESTYLE_STYLE_ATTRIBUTE = 0x40,
     }
 }
 
 /// Asserts that all RestyleHint flags have a matching nsRestyleHint value.
 #[cfg(feature = "gecko")]
 #[inline]
 pub fn assert_restyle_hints_match() {
     use gecko_bindings::structs;