diff --git a/source/Windows/AppleWin.cpp b/source/Windows/AppleWin.cpp
index e00a360a..eacbff03 100644
--- a/source/Windows/AppleWin.cpp
+++ b/source/Windows/AppleWin.cpp
@@ -786,7 +786,14 @@ static void RepeatInitialization(void)
 				GetCardMgr().Remove(SLOT5);
 			}
 
-			GetCardMgr().Insert(SLOT5, g_cmdLine.slotInsert[SLOT5]);
+			if (GetCardMgr().QuerySlot(SLOT5) != CT_Disk2)	// Ignore if already got Disk2 in slot 5
+				GetCardMgr().Insert(SLOT5, g_cmdLine.slotInsert[SLOT5]);
+		}
+
+		if (g_cmdLine.slotInsert[SLOT6] == CT_Disk2)	// For now just support Disk2 in slot 6
+		{
+			if (GetCardMgr().QuerySlot(SLOT6) != CT_Disk2)	// Ignore if already got Disk2 in slot 6
+				GetCardMgr().Insert(SLOT6, g_cmdLine.slotInsert[SLOT6]);
 		}
 
 		for (UINT i = 0; i < NUM_SLOTS; i++)