diff --git a/components/layout/block.rs b/components/layout/block.rs
index 0b10ef39000..96cf52ec251 100644
--- a/components/layout/block.rs
+++ b/components/layout/block.rs
@@ -1518,8 +1518,6 @@ impl BlockFlow {
                     }
                 }
             }
-
-            flags.union_floated_descendants_flags(child_base.flags);
         }
 
         // FIXME(pcwalton): This should consider all float descendants, not just children.