diff --git a/win/winvnc/ControlPanel.cxx b/win/winvnc/ControlPanel.cxx
index 59bb511..9c850d3 100644
--- a/win/winvnc/ControlPanel.cxx
+++ b/win/winvnc/ControlPanel.cxx
@@ -147,11 +147,11 @@
     ListConnStatus.Copy(&ListSelConn);
     ListConnStatus.setAllStatus(data);
     ListConnStatus.setDisable(isItemChecked(IDC_DISABLE_CLIENTS));
-    copyData.cbData = (DWORD)&ListConnStatus;
+    copyData.cbData = (DWORD)((long long)&ListConnStatus);
   } else {
     ListConnStatus.Clear();
   }
-  copyData.cbData = (DWORD)&ListConnStatus;
+  copyData.cbData = (DWORD)((long long)&ListConnStatus);
   SendMessage(m_hSTIcon, WM_COPYDATA, 0, (LPARAM)&copyData);
 }