diff --git a/desmume/src/addons/slot1_retail_auto.cpp b/desmume/src/addons/slot1_retail_auto.cpp
index ecb99a15f..7ca3721d6 100644
--- a/desmume/src/addons/slot1_retail_auto.cpp
+++ b/desmume/src/addons/slot1_retail_auto.cpp
@@ -43,8 +43,8 @@ public:
 		NDS_SLOT1_TYPE selection = NDS_SLOT1_RETAIL_MCROM;
 		
 		//check game ID in core emulator and select right implementation
-		if(!memcmp(gameInfo.header.gameCode,"UORE",4) ||
-			!memcmp(gameInfo.header.gameCode,"UORJ",4))
+		if(!memcmp(gameInfo.header.gameCode,"UOR",3) || //WarioWare Do It Yourself
+			!memcmp(gameInfo.header.gameCode,"UXBP",4)) //Jam with the Band
 			selection = NDS_SLOT1_RETAIL_NAND;
 
 		mSelectedImplementation = slot1_List[selection];