diff --git a/stepmania/src/DifficultyIcon.cpp b/stepmania/src/DifficultyIcon.cpp
index ecd04b99c4..3fe2959ec7 100644
--- a/stepmania/src/DifficultyIcon.cpp
+++ b/stepmania/src/DifficultyIcon.cpp
@@ -59,7 +59,7 @@ void DifficultyIcon::SetFromDifficulty( PlayerNumber pn, Difficulty dc )
 	{
 	case NUM_DIFFICULTIES:		SetState( dc );			break;
 	case NUM_DIFFICULTIES*2:	SetState( dc*2+pn );	break;
-	default:		ASSERT(0);
+	default:		FAIL_M( ssprintf( "%s: %i", this->GetID().c_str(), GetNumStates()) );
 	}	
 }