diff --git a/win/rfb_win32/ListViewControl.cxx b/win/rfb_win32/ListViewControl.cxx
index 12e0400..bd375e2 100644
--- a/win/rfb_win32/ListViewControl.cxx
+++ b/win/rfb_win32/ListViewControl.cxx
@@ -63,7 +63,7 @@
   lvI.pszText = texts[0]; 									  
   
   if(ListView_InsertItem(GetDlgItem(hDlg, idListView), &lvI) == -1)
-    return NULL;
+    return FALSE;
   
   for (i =1; i < columns; i++) {	
     SetLVItemText(