diff --git a/Userland/Libraries/LibWeb/HTML/HTMLElement.idl b/Userland/Libraries/LibWeb/HTML/HTMLElement.idl
index fb81dffd01..2917676b44 100644
--- a/Userland/Libraries/LibWeb/HTML/HTMLElement.idl
+++ b/Userland/Libraries/LibWeb/HTML/HTMLElement.idl
@@ -22,9 +22,6 @@ interface HTMLElement : Element {
     readonly attribute long offsetWidth;
     readonly attribute long offsetHeight;
 
-    // FIXME: This should come from a HTMLOrSVGElement mixin
-    [SameObject] readonly attribute DOMStringMap dataset;
-
     // FIXME: These should all come from a GlobalEventHandlers mixin
     attribute EventHandler onabort;
     attribute EventHandler onauxclick;
@@ -97,3 +94,9 @@ interface HTMLElement : Element {
     attribute EventHandler onwheel;
 
 };
+
+HTMLElement includes HTMLOrSVGElement;
+
+interface mixin HTMLOrSVGElement {
+    [SameObject] readonly attribute DOMStringMap dataset;
+};
diff --git a/Userland/Libraries/LibWeb/SVG/SVGElement.idl b/Userland/Libraries/LibWeb/SVG/SVGElement.idl
index cf448f6693..45f932b0b6 100644
--- a/Userland/Libraries/LibWeb/SVG/SVGElement.idl
+++ b/Userland/Libraries/LibWeb/SVG/SVGElement.idl
@@ -1,7 +1,8 @@
 #import <DOM/Element.idl>
+#import <HTML/HTMLElement.idl>
 #import <HTML/DOMStringMap.idl>
 
 interface SVGElement : Element {
-    // FIXME: This should come from a HTMLOrSVGElement mixin
-    [SameObject] readonly attribute DOMStringMap dataset;
 };
+
+SVGElement includes HTMLOrSVGElement;