diff --git a/src/emucore/CartF8.cxx b/src/emucore/CartF8.cxx
index 1df36c174..59d9f174e 100644
--- a/src/emucore/CartF8.cxx
+++ b/src/emucore/CartF8.cxx
@@ -35,6 +35,7 @@ CartridgeF8::CartridgeF8(const BytePtr& image, uInt32 size, const string& md5,
      md5 == "75ea60884c05ba496473c23a58edf12f" ||  // 8-in-1 Yars Revenge
      md5 == "75ee371ccfc4f43e7d9b8f24e1266b55" ||  // Snow White
      md5 == "74c8a6f20f8adaa7e05183f796eda796" ||  // Tricade Demo
+     md5 == "9905f9f4706223dadee84f6867ede8e3" ||  // Challenge
      md5 == "3c7a7b3a0a7e6319b2fa0f923ef6c9af")    // Racer Prototype
     ? 0 : 1;
 }
diff --git a/src/emucore/stella.pro b/src/emucore/stella.pro
index 684650dcf..06c3e88a1 100644
--- a/src/emucore/stella.pro
+++ b/src/emucore/stella.pro
@@ -12124,7 +12124,7 @@
 "Cartridge.MD5" "9905f9f4706223dadee84f6867ede8e3"
 "Cartridge.Manufacturer" "HES"
 "Cartridge.Name" "Challenge (HES) (PAL)"
-"Cartridge.Note" "ROM must be started in bank 1 (bank 0 contains Surfer's Paradise)"
+"Cartridge.Note" "ROM must be started in bank 1 (Surfer's Paradise if right difficulty = 'A')"
 ""
 
 "Cartridge.MD5" "9912d06eea42200a198dd3e2be18c601"