diff --git a/layout/style/nsStyleStruct.h b/layout/style/nsStyleStruct.h
index a1207c1e68c65..7524bd40b4ac2 100644
--- a/layout/style/nsStyleStruct.h
+++ b/layout/style/nsStyleStruct.h
@@ -1676,7 +1676,7 @@ struct MOZ_NEEDS_MEMMOVABLE_MEMBERS nsStyleDisplay {
         return mContain | StyleContain::LAYOUT | StyleContain::PAINT;
       case StyleContentVisibility::Hidden:
         return mContain | StyleContain::LAYOUT | StyleContain::PAINT |
-               StyleContain::INLINE_SIZE | StyleContain::BLOCK_SIZE;
+               StyleContain::SIZE;
     }
     MOZ_ASSERT_UNREACHABLE("Invalid content visibility.");
     return mContain;
diff --git a/servo/components/style/values/specified/box.rs b/servo/components/style/values/specified/box.rs
index 5eb86a51f3d01..113498bf38398 100644
--- a/servo/components/style/values/specified/box.rs
+++ b/servo/components/style/values/specified/box.rs
@@ -1372,12 +1372,12 @@ bitflags! {
         const LAYOUT = 1 << 2;
         /// `paint` variant, turns on paint containment
         const PAINT = 1 << 3;
-        /// `strict` variant, turns on all types of containment
-        const STRICT = 1 << 4 | Contain::LAYOUT.bits | Contain::PAINT.bits | Contain::SIZE.bits;
+        /// 'size' variant, turns on size containment
+        const SIZE = 1 << 4 | Contain::INLINE_SIZE.bits | Contain::BLOCK_SIZE.bits;
         /// `content` variant, turns on layout and paint containment
         const CONTENT = 1 << 5 | Contain::LAYOUT.bits | Contain::PAINT.bits;
-        /// 'size' variant, turns on size containment
-        const SIZE = 1 << 6 | Contain::INLINE_SIZE.bits | Contain::BLOCK_SIZE.bits;
+        /// `strict` variant, turns on all types of containment
+        const STRICT = 1 << 6 | Contain::LAYOUT.bits | Contain::PAINT.bits | Contain::SIZE.bits;
     }
 }