diff --git a/Sources/CSSOM/Generated.swift b/Sources/CSSOM/Generated.swift
index 10b24e14..ecc5dc7b 100644
--- a/Sources/CSSOM/Generated.swift
+++ b/Sources/CSSOM/Generated.swift
@@ -1666,6 +1666,8 @@ public extension ElementCSSInlineStyle {
     @inlinable var attributeStyleMap: StylePropertyMap { jsObject[Strings.attributeStyleMap].fromJSValue()! }
 }
 
+extension HTMLElement: ElementCSSInlineStyle {}
+
 extension MathMLElement: ElementCSSInlineStyle {}
 
 extension SVGElement: ElementCSSInlineStyle {}
@@ -1695,6 +1697,10 @@ public extension GeometryUtils {
 
 extension CSSPseudoElement: GeometryUtils {}
 
+extension Document: GeometryUtils {}
+
+extension Element: GeometryUtils {}
+
 extension Text: GeometryUtils {}
 
 public protocol LinkStyle: JSBridgedClass {}
diff --git a/Sources/WebIDLToSwift/MergeDeclarations.swift b/Sources/WebIDLToSwift/MergeDeclarations.swift
index dfd9d0ee..88e707de 100644
--- a/Sources/WebIDLToSwift/MergeDeclarations.swift
+++ b/Sources/WebIDLToSwift/MergeDeclarations.swift
@@ -15,6 +15,7 @@ enum DeclarationMerger {
     static let validExposures: Set<String> = ["Window"]
 
     static let ignoredParents: Set<String> = ["LinkStyle"]
+    static var defindedClass: Set<String> = []
 
     private static func enhanceMembers(_ members: [IDLNode]) -> [IDLNode] {
         members.flatMap { member -> [IDLNode] in
@@ -148,7 +149,9 @@ enum DeclarationMerger {
                 partialResult.exposedToAll = partialResult.exposedToAll || interface.exposedToAll
                 partialResult.global = partialResult.global || interface.global
             }
-            interface.mixins = includes.removeValue(forKey: interface.name) ?? []
+            if !DeclarationMerger.defindedClass.contains(interface.name) {
+                interface.mixins = includes.removeValue(forKey: interface.name) ?? []
+            }
             if let decl = interface.members.first(where: { $0 is IDLIterableDeclaration }) as? IDLIterableDeclaration {
                 interface.mixins.append(decl.async ? "AsyncSequence" : "Sequence")
             }
diff --git a/Sources/WebIDLToSwift/WebIDL+SwiftRepresentation.swift b/Sources/WebIDLToSwift/WebIDL+SwiftRepresentation.swift
index afe8dcf0..67bb0ab4 100644
--- a/Sources/WebIDLToSwift/WebIDL+SwiftRepresentation.swift
+++ b/Sources/WebIDLToSwift/WebIDL+SwiftRepresentation.swift
@@ -243,6 +243,7 @@ extension MergedInterface: SwiftRepresentable {
         } else {
             let inheritance = (parentClasses.isEmpty ? ["JSBridgedClass"] : parentClasses) + mixins
             header = "\(access) class \(name): \(sequence: inheritance.map(SwiftSource.init(_:)))"
+            DeclarationMerger.defindedClass.insert(name)
         }
 
         return """