diff --git a/ed/idl/mathml-core.idl b/ed/idl/mathml-core.idl
index a226ff084c16..14a0a2799d4c 100644
--- a/ed/idl/mathml-core.idl
+++ b/ed/idl/mathml-core.idl
@@ -7,5 +7,5 @@
 interface MathMLElement : Element { };
 MathMLElement includes GlobalEventHandlers;
 MathMLElement includes DocumentAndElementEventHandlers;
-MathMLElement includes HTMLOrForeignElement;
+MathMLElement includes HTMLOrSVGElement;
 MathMLElement includes ElementCSSInlineStyle;