diff --git a/include/mshtml.idl b/include/mshtml.idl
index 2837b60ffb8..71d49e1aab8 100644
--- a/include/mshtml.idl
+++ b/include/mshtml.idl
@@ -24,6 +24,7 @@
 import "ocidl.idl";
 import "dimm.idl";
 import "shtypes.idl";
+import "dispex.idl";
 
 cpp_quote("#include <olectl.h>")