diff --git a/sdk/lib/atl/atlcomcli.h b/sdk/lib/atl/atlcomcli.h
index 9c19e3371c4..20151dba9f6 100644
--- a/sdk/lib/atl/atlcomcli.h
+++ b/sdk/lib/atl/atlcomcli.h
@@ -301,6 +301,12 @@ public:
         return *this;
     }
 
+    void Attach(BSTR bstr)
+    {
+        ::SysFreeString(m_str);
+        m_str = bstr;
+    }
+
     BSTR Detach()
     {
         BSTR str = m_str;