diff --git a/src/mac/carbon/listctrl_mac.cpp b/src/mac/carbon/listctrl_mac.cpp
index b54dba2296..52cf2e32b2 100644
--- a/src/mac/carbon/listctrl_mac.cpp
+++ b/src/mac/carbon/listctrl_mac.cpp
@@ -2754,7 +2754,7 @@ void wxMacDataBrowserListCtrlControl::ItemNotification(DataBrowserItemID itemID,
         }
         else
         {
-            event.m_itemIndex = (long)itemID;
+            event.m_itemIndex = (long)itemID-1;
         }
 
         switch (message)