diff --git a/stepmania/src/GameConstantsAndTypes.cpp b/stepmania/src/GameConstantsAndTypes.cpp
index 484a5931ab..4aa572ac80 100644
--- a/stepmania/src/GameConstantsAndTypes.cpp
+++ b/stepmania/src/GameConstantsAndTypes.cpp
@@ -59,7 +59,7 @@ static const char *PlayModeNames[] = {
 XToString( PlayMode, NUM_PlayMode );
 XToLocalizedString( PlayMode );
 StringToX( PlayMode );
-LuaFunction( PlayModeToLocalizedString, PlayModeToLocalizedString((PlayMode) IArg(1)) );
+LuaFunction( PlayModeToLocalizedString, PlayModeToLocalizedString(Enum::Check<PlayMode>(L, 1)) );
 LuaXType( PlayMode );
 
 RankingCategory AverageMeterToRankingCategory( int iAverageMeter )