diff --git a/include/mshtmhst.idl b/include/mshtmhst.idl
index 06d9383e68d..29941e64cfc 100644
--- a/include/mshtmhst.idl
+++ b/include/mshtmhst.idl
@@ -151,7 +151,7 @@ cpp_quote("typedef HRESULT WINAPI SHOWHTMLDIALOGEXFN(HWND,IMoniker*,DWORD,VARIAN
 cpp_quote("typedef HRESULT WINAPI SHOWMODELESSHTMLDIALOGFN(HWND,IMoniker*,VARIANT*,VARIANT*,IHTMLWindow2**);");
 
 cpp_quote("EXTERN_C HRESULT WINAPI ShowHTMLDialog(HWND,IMoniker*,VARIANT*,WCHAR*,VARIANT*);");
-cpp_quote("EXTERN_C HRESULT WINAPI ShowHTMLDialogEx(HWND,IMoniker*,DWORD,VARIANT*,WCHAR,VARIANT*);");
-cpp_quote("EXTERN_C HRESULT WINAPI ShowModelessHTMLDialog(HWND,IMoniker*,VARIANT,IHTMLWindow2**);");
+cpp_quote("EXTERN_C HRESULT WINAPI ShowHTMLDialogEx(HWND,IMoniker*,DWORD,VARIANT*,WCHAR*,VARIANT*);");
+cpp_quote("EXTERN_C HRESULT WINAPI ShowModelessHTMLDialog(HWND,IMoniker*,VARIANT*,VARIANT*,IHTMLWindow2**);");
 cpp_quote("EXTERN_C HRESULT WINAPI RunHTMLApplication(HINSTANCE,HINSTANCE,LPSTR,int);");
 cpp_quote("EXTERN_C HRESULT WINAPI CreateHTMLPropertyPage(IMoniker*,IPropertyPage**);");